Exchange Online 限制Exchange Online limits

查找各个服务方面的 Exchange Online 限制,包括通讯簿限制、邮箱存储空间限制以及报告和邮件跟踪限制等。Find the Exchange Online limits for a variety of service areas, including address book limits, mailbox storage limits, and reporting and message trace limits, to name just a few.

备注

如果需要任务协助,或者如果正在对问题进行故障排除,以下文章可能会很有帮助:If you need assistance with a task or if you are troubleshooting a problem, you might find the following articles helpful:

Microsoft Exchange Online 的限制可归为以下几个类别:The limits in Microsoft Exchange Online fit into one of the following categories:

重要

  • 应用于 Microsoft 365 组织的限制可能会有所不同,具体取决于组织在服务中已注册多长时间。The limits applied to a Microsoft 365 organization may differ depending on how long the organization has been enrolled in the service.
  • 如果 Microsoft 数据中心内的限制更改,可能需要一段时间,才能将更改应用于所有现有客户。When a limit is changed in the Microsoft data centers, it can take some time to apply the change to all existing customers.
  • 虽然您无法修改其中大多数限制,但您和您的用户应了解它们。You can't modify most of these limits, but you and your users should be aware of them.
  • 这些限制适用于内部收件人和外部收件人。These limits apply to both internal and external recipients.
  • Exchange Online Protection (EOP) 默认保护 Exchange Online 邮箱。By default, Exchange Online Protection (EOP) protects Exchange Online mailboxes. 有关适用于 Exchange Online 中的 EOP 功能的限制,请参阅 Exchange Online Protection 限制For limits that apply to EOP features in Exchange Online, see Exchange Online Protection limits.
  • 有关 Office 365 组限制的信息,请参阅 "如何管理我的组?"For information about Office 365 group limits, see "How do I manage my groups?" 了解有关 Microsoft 365 组的信息in Learn about Microsoft 365 groups.

通讯簿限制Address book limits

  • 地址列表限制:可以在 Exchange Online 或 exchange Server 2013 组织中创建的地址列表的最大数量。Address list limit: The maximum number of address lists that can be created in an Exchange Online or Exchange Server 2013 organization. 此数目包括 Exchange Online 中的默认地址列表,如"所有联系人"和"所有组"。This number includes the default address lists in Exchange Online, such as All Contacts and All Groups.

    备注

    最多可以将 20 个地址列表分配给一个脱机通讯簿 (OAB)。A maximum of 20 address lists can be assigned to a single offline address book (OAB).

  • 脱机通讯簿限制:可以在 Exchange Online 或 exchange Server 2013 组织中创建 (OAB) 的最大脱机通讯簿数。Offline address book limit: The maximum number of offline address books (OAB) that can be created in an Exchange Online or Exchange Server 2013 organization.

  • 通讯簿策略限制:在 Exchange Online 或 exchange Server 2013 组织中创建 (ABP) 的通讯簿策略的最大数量。Address book policies limit: The maximum number of address book policies (ABP) that be created in an Exchange Online or Exchange Server 2013 organization.

  • 全局地址列表:在 Exchange Online 或 exchange Server 2013 组织中创建 (GAL) 的全局地址列表的最大数量。Global address lists: The maximum number of global address lists (GAL) that be created in an Exchange Online or Exchange Server 2013 organization.

通讯簿限制Address book limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
地址列表限制Address list limit 10001000 10001000 10001000 10001000 10001000 10001000
脱机通讯簿 (OAB) 限制Offline address book (OAB) limit 250250 250250 250250 250250 250250 250250
通讯簿策略 (ABP) 限制Address book policies (ABP) limit 250250 250250 250250 250250 250250 250250
全局地址列表限制Global address lists limit 250250 250250 250250 250250 250250 250250

各个独立计划的通讯簿限制Address book limits across standalone plans

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
地址列表限制Address list limit 10001000 10001000 10001000 10001000
脱机通讯簿 (OAB) 限制Offline address book (OAB) limit 250250 250250 250250 250250
通讯簿策略 (ABP) 限制Address book policies (ABP) limit 250250 250250 250250 250250
全局地址列表限制Global address lists limit 250250 250250 250250 250250

邮箱存储限制Mailbox storage limits

可用邮箱存储量由邮箱类型和用户的订阅许可证决定。管理员可以减小每位用户或全局的最大邮箱大小。The amount of mailbox storage available is determined by the mailbox type and the user's subscription license. Administrators can reduce maximum mailbox sizes per user or globally.

备注

不允许使用日记、传输规则或自动转发规则将邮件复制到 Exchange Online 邮箱中来进行存档。Using journaling, transport rules, or auto-forwarding rules to copy messages to an Exchange Online mailbox for the purposes of archiving is not permitted. 用户的存档邮箱只供该用户使用。A user's archive mailbox is intended for just that user. Microsoft 保留在用户的存档邮箱用于存储其他用户的存档数据或不适当使用的情况下,拒绝无限存档的权利。Microsoft reserves the right to deny unlimited archiving in instances where a user's archive mailbox is used to store archive data for other users or in other cases of inappropriate use.

存储限制Storage limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
用户邮箱User mailboxes 50 GB50 GB 50 GB50 GB 50 GB50 GB 100 GB100 GB 100 GB100 GB 2 GB2 GB
存档邮箱7、8Archive mailboxes7,8 50 GB50 GB 50 GB50 GB 50 GB50 GB Unlimited1Unlimited1 Unlimited1Unlimited1 不可用4Not available4
共享邮箱10Shared mailboxes10 50 GB250 GB2 50 GB250 GB2 50 GB250 GB2 50/100 GB2、950/100 GB2,9 50/100 GB2、950/100 GB2,9 50 GB250 GB2
资源邮箱Resource mailboxes 50 GB350 GB3 50 GB350 GB3 50 GB350 GB3 50 GB3,950 GB3,9 50 GB3,950 GB3,9 50 GB350 GB3
网站邮箱5Site mailboxes5 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB 不可用Not available
公用文件夹邮箱Public folder mailboxes 50 GB650 GB6 50 GB650 GB6 50 GB650 GB6 100 GB6100 GB6 100 GB6100 GB6 不可用Not available
组邮箱Group mailboxes 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB

备注

1 每个用户最初都会获得 100 GB 的存档邮箱存储空间。1 Each user initially receives 100 GB of storage in the archive mailbox. 启用自动扩展存档后,只要达到 100 GB 存储容量,就会自动添加额外存储空间。When auto-expanding archiving is turned on, additional storage is automatically added when the 100 GB storage capacity is reached. 有关详细信息,请参阅 Overview of unlimited archiving in Office 365(Office 365 中的无限制存档概述)。For more information, see Overview of unlimited archiving in Office 365.
2 若要访问共享邮箱,用户必须具有 Exchange Online 许可证,但共享邮箱不需要单独的许可证。2 To access a shared mailbox, a user must have an Exchange Online license, but the shared mailbox doesn't require a separate license. 如果没有许可证,共享邮箱限制为 50 GB。Without a license, shared mailboxes are limited to 50 GB. 若要将大小限制增加到 100 GB,必须为共享邮箱分配 exchange Online 计划2许可证或 exchange online 计划1许可证和 Exchange Online 存档附加许可证。To increase the size limit to 100 GB, the shared mailbox must be assigned an Exchange Online Plan 2 license or an Exchange Online Plan 1 license with an Exchange Online Archiving add-on license. 这还使您能够启用自动扩展存档,以实现无限量的存档存储容量。This will also let you enable auto-expanding archiving for an unlimited amount of archive storage capacity. 同样,如果您想要在诉讼保留中放置共享邮箱,共享邮箱必须具有 exchange Online 计划2许可证或 exchange online 计划1许可证和 Exchange Online 存档附加许可证。Similarly, if you want to place a shared mailbox on litigation hold, the shared mailbox must have an Exchange Online Plan 2 license or an Exchange Online Plan 1 license with an Exchange Online Archiving add-on license. 如果您想要应用 Office 365 高级威胁防护、高级电子数据展示或自动保留策略等高级功能,则必须为共享邮箱 (s) 授予这些功能。If you want to apply advanced features such as Office 365 Advanced Threat Protection, Advanced eDiscovery, or automatic retention polices, the shared mailbox must be licensed for those feature(s).
3 资源邮箱不需要许可证。3 Resource mailboxes don't require a license. 但是,如果没有许可证,资源邮箱限制为 50 GB。However, without a license, resource mailboxes are limited to 50 GB. 若要增加邮箱大小,必须分配 E3 或 E5 许可证。To increase the mailbox size, an E3 or E5 license must be assigned. 这会将邮箱大小增加至 100 GB。This will increase the mailbox to 100 GB.
4存档邮箱不包含在 Exchange Online Kiosk 中。4 Archive mailboxes aren't included in Exchange Online Kiosk. 不过,可以通过 Exchange Online Archiving 以附加内容的形式购买。However, they can be purchased as an add-on through Exchange Online Archiving. 有关详细信息,请参阅 Exchange Online 存档服务说明For more information, please see the Exchange Online Archiving service description.
在2017中,从 Exchange Online 和 SharePoint Online 中删除了5 个网站邮箱。5 Site mailboxes were removed from Exchange Online and SharePoint Online in 2017.
6 只能拥有 1000 个公用文件夹邮箱,所有公用文件夹邮箱的总大小上限为 50 TB。6 You are limited to 1,000 public folder mailboxes, and the maximum total size of all public folder mailboxes is 50 TB. 层次结构服务邮箱限制为 100 个公共文件夹邮箱。Hierarchy Serving mailboxes are limited to 100 public folder mailboxes.
7 存档邮箱仅可用于为已应用其许可证的单个用户或实体(例如共享邮箱)存档邮件。7 Archive mailboxes can only be used to archive mail for a single user or entity (such as a shared mailbox) for which a license has been applied. 禁止将存档邮箱用作为一种多个用户或实体存储邮件的方式。Using archive mailboxes as a means of storing mail from multiple users or entities is prohibited. 例如,IT 管理员无法创建共享邮箱,也无法让用户复制(通过"抄送"或"密件抄送"字段,或通过传输规则)共享邮箱以便进行显式存档。For example, an IT administrator can't create a shared mailbox and have users copy it (through the Cc or Bcc field, or through a transport rule) for the explicit purpose of archiving. 请注意,多个用户使用的共享邮箱实际上并不存储这些单个用户的电子邮件。Note that a shared mailbox that multiple people use does not actually store email for those individual users. 多个用户拥有访问权限,且他们以共享邮箱发送电子邮件。Multiple users have access, and they send email as the shared mailbox. 因此,共享邮箱中仅存储以共享邮箱的名义往来发送的电子邮件。Therefore, the only emails stored in the shared mailbox are those sent to or from it, as the shared mailbox.
8 如果在 Exchange Online 中创建了保留策略,则仅当用户的主邮箱大于 10 MB 时,邮件才会自动移动到用户的存档邮箱。8 If you have created a retention policy in Exchange Online, messages will be automatically moved to a user's archive mailbox only if the user's primary mailbox is larger than 10 MB. 小于 10 MB 的邮箱不会自动运行保留策略。The retention policy will not run automatically for mailboxes that are smaller than 10 MB.
9 共享和资源邮箱无需许可证。9 Shared and resource mailboxes don't require a license. 但是,如果没有许可证,则这些邮箱具有 50 GB 限制。However, without a license, these mailboxes are limited to 50 GB. 若要增加邮箱大小,必须分配 E3 或 E5 许可证。To increase the mailbox size, an E3 or E5 license must be assigned. 这会将邮箱大小增加至 100 GB。This will increase the mailbox to 100 GB.
10 默认情况下,共享邮箱具有一个相关联的活动用户帐户,其中包含系统生成的 (未知) 密码。10 By default, shared mailboxes have an associated active user account with a system-generated (unknown) password. 若要阻止登录以获取关联的共享邮箱帐户,请参阅 共享邮箱帐户的阻止登录To block sign-in for the associated shared mailbox account, see Block sign-in for the shared mailbox account.

跨独立计划的存储限制Storage limits across standalone plans

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
用户邮箱User mailboxes 2 GB12 GB1 50 GB50 GB 100 GB100 GB 2 GB2 GB
存档邮箱8、9Archive mailboxes8, 9 100 GB1100 GB1 50 GB50 GB Unlimited2Unlimited2 不可用5Not available5
共享邮箱11Shared mailboxes11 2 GB12 GB1 50 GB350 GB3 50 GB3,1050 GB3,10 50 GB350 GB3
资源邮箱Resource mailboxes 2 GB12 GB1 50 GB450 GB4 50 GB4,1050 GB4,10 50 GB450 GB4
公用文件夹邮箱Public folder mailboxes 2 GB62 GB6 50 GB750 GB7 100 GB7100 GB7 不可用Not available
组邮箱Group mailboxes 50 GB50 GB 50 GB50 GB 50 GB50 GB 50 GB50 GB

备注

1 这是 Exchange Server 2013 组织的默认邮箱大小。1 This is the default mailbox size for Exchange Server 2013 organizations. 管理员可以为其组织更改此值。Administrators can change this value for their organization. 本地邮箱没有最大存储限制。There isn't a maximum storage limit for on-premises mailboxes.
2 每个用户的存档邮箱中最初会有 100 GB 存储空间。2 Each user initially receives 100 GB of storage in the archive mailbox. 启用自动扩展存档后,只要达到 100 GB 存储容量,就会自动添加额外存储空间。When auto-expanding archiving is turned on, additional storage is automatically added when the 100 GB storage capacity is reached. 有关详细信息,请参阅 Overview of unlimited archiving in Office 365(Office 365 中的无限制存档概述)。For more information, see Overview of unlimited archiving in Office 365. 有关自动扩展存档的可用性的详细信息,请参阅 Microsoft 365 路线图See the Microsoft 365 Roadmap for details about availability for auto-expanding archiving.
3 若要访问共享邮箱,用户必须具有 Exchange Online 许可证,但共享邮箱不需要单独的许可证。3 To access a shared mailbox, a user must have an Exchange Online license, but the shared mailbox doesn't require a separate license. 如果没有许可证,共享邮箱限制为 50 GB。Without a license, shared mailboxes are limited to 50 GB. 若要将大小限制增加到 100 GB,必须为共享邮箱分配 exchange Online 计划2许可证或 exchange online 计划1许可证和 Exchange Online 存档附加许可证。To increase the size limit to 100 GB, the shared mailbox must be assigned an Exchange Online Plan 2 license or an Exchange Online Plan 1 license with an Exchange Online Archiving add-on license. 这还使您能够启用自动扩展存档,以实现无限量的存档存储容量。This will also let you enable auto-expanding archiving for an unlimited amount of archive storage capacity. 同样,如果您想要在诉讼保留中放置共享邮箱,共享邮箱必须具有 exchange Online 计划2许可证或 exchange online 计划1许可证和 Exchange Online 存档附加许可证。Similarly, if you want to place a shared mailbox on litigation hold, the shared mailbox must have an Exchange Online Plan 2 license or an Exchange Online Plan 1 license with an Exchange Online Archiving add-on license. 如果您想要应用 Office 365 高级威胁防护、高级电子数据展示或自动保留策略等高级功能,则必须为共享邮箱 (s) 授予这些功能。If you want to apply advanced features such as Office 365 Advanced Threat Protection, Advanced eDiscovery, or automatic retention polices, the shared mailbox must be licensed for those feature(s).
4 资源邮箱无需许可证。4 Resource mailboxes don't require a license. 但是,如果没有许可证,资源邮箱限制为 50 GB。However, without a license, resource mailboxes are limited to 50 GB. 若要增加邮箱大小,必须分配 Exchange Online 套餐 2 许可证。To increase the mailbox size, an Exchange Online Plan 2 license must be assigned. 这会将邮箱大小增加至 100 GB。This will increase the mailbox to 100 GB.
5 存档邮箱不包含在 Exchange Online Kiosk 中。5 Archive mailboxes aren't included in Exchange Online Kiosk. 不过,可以通过 Exchange Online Archiving 以附加内容的形式购买。However, they can be purchased as an add-on through Exchange Online Archiving. 有关详细信息,请参阅 Exchange Online 存档服务说明For more information, please see the Exchange Online Archiving service description.
6 这是 Microsoft Exchange Server 2013 组织的默认邮箱大小。6 This is the default mailbox size for Microsoft Exchange Server 2013 organizations. 管理员可以为其组织更改此值。Administrators can change this value for their organization. Exchange Server 2013 具有 100 个公共文件夹邮箱的限制,且所有公共文件夹邮箱的最大总大小为 50 TB。In Exchange Server 2013, you are limited to 100 public folder mailboxes, and the maximum total size of all public folder mailboxes is 50 TB.
7 Exchange Server 具有 1,000 个公共文件夹邮箱的限制,且所有公共文件夹邮箱的最大总大小为 50 TB。 7 In Exchange Online, you are limited to 1,000 public folder mailboxes, and the maximum total size of all public folder mailboxes is 50 TB.
8 存档邮箱仅可用于为已应用其许可证的单个用户或实体存档邮件。8 Archive mailboxes can only be used to archive mail for a single user or entity for which a license has been applied. 禁止将存档邮箱作为一种为多个用户存档邮件的方式。Using an archive mailbox as a means to store mail from multiple users or entities is prohibited. 例如,IT 管理员无法创建共享邮箱且无法使用户复制(通过"抄送"或"密件抄送"字段,或通过传输规则)共享邮箱以便进行显式存档。For example, IT administrators can't create shared mailboxes and have users copy (through the Cc or Bcc field, or through a transport rule) a shared mailbox for the explicit purpose of archiving.
9 如果已在 Exchange Online 中创建保留策略,则仅当用户的主邮箱大于 10 MB 时邮件才会自动移至用户的存档邮箱。9 If you have created a retention policy in Exchange Online, messages will be automatically moved to a user's archive mailbox only if the user's primary mailbox is larger than 10 MB. 小于 10 MB 的邮箱不会自动运行保留策略。The retention policy will not run automatically for mailboxes that are smaller than 10 MB.
10 个 共享邮箱和资源邮箱不需要许可证。10 Shared and resource mailboxes don't require a license. 但是,如果没有许可证,则这些邮箱具有 50 GB 限制。However, without a license, these mailboxes are limited to 50 GB. 若要增加邮箱大小,必须分配 Exchange Online 套餐 2 许可证。To increase the mailbox size, an Exchange Online Plan 2 license must to be assigned. 这会将邮箱大小增加至 100 GB。This will increase the mailbox to 100 GB.
11 默认情况下,共享邮箱具有一个相关联的活动用户帐户,其中包含系统生成的 (未知) 密码。11 By default, shared mailboxes have an associated active user account with a system-generated (unknown) password. 若要阻止登录以获取关联的共享邮箱帐户,请参阅 共享邮箱帐户的阻止登录To block sign-in for the associated shared mailbox account, see Block sign-in for the shared mailbox account.

容量报警Capacity alerts

Exchange Online 将在用户的邮箱接近或达到最大容量时提供三种通知类型:Exchange Online provides three kinds of notifications when a user's mailbox is nearing, or at, capacity:

  • 警告:用户收到一封电子邮件,警告邮箱正在接近最大大小限制。Warning: The user receives an email warning that the mailbox is approaching the maximum size limit. 此警告旨在建议用户删除不需要的邮件。This warning is intended to encourage users to delete unwanted mail.

  • 禁止发送:达到邮箱大小限制时,用户收到一个 "禁止发送" 通知电子邮件。Prohibit Send: The user receives a prohibit-send notification email when the mailbox size limit is reached. 在删除足够的电子邮件以使邮箱低于大小限制之前,用户无法发送新邮件。The user can't send new messages until enough email is deleted to bring the mailbox below the size limit.

  • 禁止发送/接收:当达到邮箱大小限制时,Exchange Online 会拒绝所有传入邮件,并向发件人发送未送达报告 (NDR) 。Prohibit Send/Receive: Exchange Online rejects any incoming mail when the mailbox size limit is reached, and sends a non-delivery report (NDR) to the sender. 发件人可选择稍后尝试重新发送该邮件。The sender has the option to try resending the mail later. 若要再次接收邮件,用户必须删除邮件,直到邮箱的使用容量低于大小限制为止。To receive messages again, the user must delete email until the mailbox is below the size limit.

容量报警Capacity alerts

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
警告Warning 49 GB49 GB 49 GB49 GB 49 GB49 GB 98 GB98 GB 98 GB98 GB 1.96 GB1.96 GB
禁止发送Prohibit Send 49.5 GB49.5 GB 49.5 GB49.5 GB 49.5 GB49.5 GB 99 GB99 GB 99 GB99 GB 1.98 GB1.98 GB
禁止发送/接收Prohibit Send/Receive 50 GB50 GB 50 GB50 GB 50 GB50 GB 100 GB100 GB 100 GB100 GB 2 GB2 GB

跨独立计划的容量警报Capacity alerts across standalone plans

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
警告Warning 1.9 GB11.9 GB1 49 GB49 GB 98 GB98 GB 1.96 GB1.96 GB
禁止发送Prohibit Send 2 GB12 GB1 49.5 GB49.5 GB 99 GB99 GB 1.98 GB1.98 GB
禁止发送/接收Prohibit Send/Receive 2.3 GB12.3 GB1 50 GB50 GB 100 GB100 GB 2 GB2 GB

备注

1 这是 Exchange Server 2013 组织的默认值。管理员可以为其组织更改此值。1 This is the default value for Exchange Server 2013 organizations. Administrators can change this value for their organization.

邮箱文件夹限制Mailbox folder limits

这些限制旨在将邮箱限制为在 Exchange Online 中受支持的已知尺寸。这些限制旨在防止文件夹中存在不限数量的邮箱项目,邮箱中存在不限数量的文件夹或 Exchange Online 组织中存在不限数量的公用文件夹。出于实用目的,邮箱文件夹限制实际上不受限制,足以支持大多数迁移到 Exchange Online 的 Exchange Online 邮箱和内部部署邮箱。These limits are intended to limit mailboxes to known dimensions that can be supported in Exchange Online. The goal of these limits is to prevent an infinite number of mailbox items per folder, an infinite number of folders per mailbox, or an infinite number of public folders per Exchange Online organization. For practical purposes, mailbox folder limits are in effect unlimited and sufficient to support most Exchange Online mailboxes and on-premises mailboxes that are migrated to Exchange Online.

  • 每个邮箱文件夹的最大邮件数:指定邮箱文件夹的邮件的最大数量。Maximum number of messages per mailbox folder: Specifies the maximum number of messages for a mailbox folder. 达到该限制时,将无法传递新邮件或无法将其保存在某个文件夹中。New messages can't be delivered or saved in a folder when this limit is reached.

  • 每个邮箱文件夹的邮件数警告:指定在 Exchange Online 向邮箱所有者发送警告邮件之前,邮箱文件夹可以保留的邮件数。Warning for number of messages per mailbox folder: Specifies the number of messages that a mailbox folder can hold before Exchange Online sends a warning message to the mailbox owner. 达到此配额时,将每天发送一次警告消息。When this quota is reached, warning messages are sent once a day.

  • "可恢复的项目" 文件夹中每个文件夹的邮件最大数量:指定可在 "可恢复的项目" 文件夹中的每个文件夹中包含的邮件的最大数量。Maximum number of messages per folder in the Recoverable Items folder: Specifies the maximum number of messages that can be contained in each folder in the Recoverable Items folder. 文件夹超出此限制时,将无法存储新邮件。When a folder exceeds this limit, it can't store new messages. 例如,如果"可恢复邮件"文件夹中的"删除"文件夹超出邮件计数限制,而邮箱所有者试图从邮箱中永久删除邮件,删除将会失败。For example, if the Deletions folder in the Recoverable Items folder has exceeded the message count limit and the mailbox owner attempts to permanently delete items from their mailbox, the deletion will fail.

  • "可恢复的项目" 文件夹中每个文件夹的邮件数警告:指定在 Exchange Online 将事件记录到应用程序事件日志中之前,"可恢复的项目" 文件夹中的每个文件夹可以保留的邮件数。Warning for number of messages per folder in the Recoverable Items folder: Specifies the number of messages that each folder in the Recoverable Items folder can hold before Exchange Online logs an event to the application event log.

  • 每个邮箱文件夹的子文件夹的最大数量:指定可以在邮箱文件夹中创建的子文件夹的最大数量。Maximum number of subfolders per mailbox folder: Specifies the maximum number of subfolders that can be created in a mailbox folder. 达到此限制时,邮箱所有者将不能创建新的子文件夹。The mailbox owner won't be able to create a new subfolder when this limit is reached.

  • 每个邮箱文件夹的子文件夹数警告:指定在 Exchange Online 向邮箱所有者发送警告邮件之前,可以在邮箱文件夹中创建的子文件夹的数量。Warning for number of subfolders per mailbox folder: Specifies the number of subfolders that can be created in a mailbox folder before Exchange Online sends a warning message to the mailbox owner. 达到此配额时,将每天发送一次警告消息。When this quota is reached, warning messages are sent once a day.

  • 最大文件夹层次结构深度:指定邮箱的文件夹层次结构中的最大级别数。Maximum folder hierarchy depth: Specifies the maximum number of levels in the folder hierarchy of a mailbox. 达到此限制时,邮箱所有者将无法在邮箱文件夹的文件夹层次结构中创建其他级别。The mailbox owner won't be able to create another level in the folder hierarchy of the mailbox folder when this limit is reached.

  • 针对文件夹层次结构深度的警告:指定在 Exchange Online 向邮箱所有者发送警告邮件之前可以创建的邮箱文件夹的文件夹层次结构中的级别数。Warning for folder hierarchy depth: Specifies the number of levels in the folder hierarchy of a mailbox folder that can be created before Exchange Online sends a warning message to the mailbox owner. 达到此配额时,将每天发送一次警告消息。When this quota is reached, warning messages are sent once a day.

  • 公用文件夹的最大数量:指定完整公用文件夹层次结构中的公用文件夹的最大数量。Maximum number of public folders: Specifies the maximum number of public folders in the complete public folder hierarchy. 达到此限制后,必须删除现有公用文件夹,才可以创建新的公用文件夹。When this limit is reached, existing public folders must be deleted before new public folders can be created.

  • 每个公用文件夹的子文件夹的最大数量:指定可在公用文件夹中创建的子文件夹的最大数量。Maximum number of subfolders per public folder: Specifies the maximum number of subfolders that can be created in a public folder. 当达到此限制时,无法在公用文件夹中创建新的子文件夹。New subfolders can't be created in a public folder when this limit is reached.

  • 每个公用文件夹的子文件夹数警告:指定在 Exchange Online 向文件夹所有者发送警告邮件之前,可以在公用文件夹中创建的子文件夹的数量。Warning for number of subfolders per public folder: Specifies the number of subfolders that can be created in a public folder before Exchange Online sends a warning message to the folder owner. 如果不存在所有者,则警告消息会发送到具有所有者权限的用户。If no owner exists, warning messages are sent to users with Owner permissions. 达到此配额时,将每天发送一次警告消息。When this quota is reached, warning messages are sent once a day.

邮箱文件夹限制Mailbox folder limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
每个邮箱文件夹的邮件的最大数量Maximum number of messages per mailbox folder 1 百万1 million 1 百万1 million 1 百万1 million 1 百万1 million 1 百万1 million 1 百万1 million
每个邮箱文件夹的邮件数量的警告Warning for number of messages per mailbox folder 900,000900,000 900,000900,000 900,000900,000 900,000900,000 900,000900,000 900,000900,000
“可恢复邮件”文件夹中的每个文件夹的邮件最大数量Maximum number of messages per folder in the Recoverable Items folder 3 百万3 million 3 百万3 million 3 百万3 million 3 百万3 million 3 百万3 million 3 百万3 million
主邮箱(未处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in primary mailbox (not on hold) 30 GB30 GB 30 GB30 GB 30 GB30 GB 30 GB30 GB 30 GB30 GB 30 GB30 GB
主邮箱(处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in primary mailbox (on hold) 100 GB100 GB 100 GB100 GB 100 GB100 GB 100 GB100 GB 100 GB100 GB 100 GB100 GB
存档邮箱(未处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in archive mailbox (not on hold) 30 GB30 GB 30 GB30 GB 30 GB30 GB Unlimited2Unlimited2 Unlimited2Unlimited2 30 GB30 GB
存档邮箱(处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in archive mailbox (on hold) 100 GB1100 GB1 100 GB1100 GB1 100 GB1100 GB1 Unlimited2Unlimited2 Unlimited2Unlimited2 100 GB1100 GB1
“可恢复邮件”文件夹中的每个文件夹的邮件数量警告Warning for number of messages per folder in the Recoverable Items folder 2.75 百万2.75 million 2.75 百万2.75 million 2.75 百万2.75 million 2.75 百万2.75 million 2.75 百万2.75 million 2.75 百万2.75 million
每个邮箱文件夹的子文件夹的最大数量Maximum number of subfolders per mailbox folder 10000210,0002 10000210,0002 10000210,0002 10000210,0002 10000210,0002 10000210,0002
每个邮箱文件夹的子文件夹数量的警告Warning for number of subfolders per mailbox folder 90009000 90009000 90009000 90009000 90009000 90009000
最大文件夹层次结构深度Maximum folder hierarchy depth 300300 300300 300300 300300 300300 300300
文件夹层次结构深度的警告Warning for folder hierarchy depth 250250 250250 250250 250250 250250 250250
公用文件夹最大数Maximum number of public folders 500,000500,000 500,000500,000 500,000500,000 500,000500,000 500,000500,000 不可用Not available
每个公用文件夹的子文件夹的最大数量Maximum number of subfolders per public folder 10,00010,000 10,00010,000 10,00010,000 10,00010,000 10,00010,000 不可用Not available
每个公用文件夹的子文件夹数量的警告Warning for number of subfolders per public folder 90009000 90009000 90009000 90009000 90009000 不可用Not available

备注

1 这是"可恢复的项目"文件夹的存储配额,不是整个存档邮箱的配额。1 This is the storage quota for the Recoverable Items folder, not the quota for the entire archive mailbox. 对于拥有 Exchange Online 套餐 2 许可证的用户或者拥有 Exchange Online 套餐 1 和 Exchange Online Archiving 许可证的用户,存档邮箱的存储配额没有限制。The storage quota for the archive mailbox is unlimited for users with an Exchange Online Plan 2 license or for users who have both an Exchange Online Plan 1 and an Exchange Online Archiving license. 有关提高可恢复项目配额的信息,请参阅提高保留邮箱的可恢复项目配额For information about increasing the Recoverable Items quota, see Increase the Recoverable Items quota for mailboxes on hold.
2 存档邮箱中的可恢复项目文件夹的初始存储配额为 100 GB。2 The initial storage quota for the Recoverable Items folder in an archive mailbox is 100 GB. 启用自动扩展存档后,只要达到“可恢复的项目”文件夹的存储容量,就会自动添加额外存储空间。When auto-expanding archiving is turned on, additional storage is automatically added when the storage capacity for the Recoverable Items folder is reached. 有关详细信息,请参阅 在 Office 365 中不受限制地存档概述For more information, see Overview of unlimited archiving in Office 365. 有关自动扩展存档可用性的详细信息,请参阅 Microsoft 365 路线图See the Microsoft 365 Roadmap for details about availability of auto-expanding archiving. 2 这是一个存储限制;它是邮箱形状约束之一。2 This is a store limit; it is one of the mailbox shape constraints. 对于任何给定的父文件夹,只能有10000的直接子文件夹。There can be only 10,000 direct child folders for any given parent. 无论迁移或其他创建文件夹的客户端都是如此。This applies regardless of migration or other clients creating folders.

跨独立计划的邮箱文件夹限制Mailbox folder limits across standalone plans

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
每个邮箱文件夹的邮件的最大数量Maximum number of messages per mailbox folder 无限制1No limit1 1 百万1 million 1 百万1 million 1 百万1 million
每个邮箱文件夹的邮件数量的警告Warning for number of messages per mailbox folder 无限制No limit 900,000900,000 900,000900,000 900,000900,000
“可恢复邮件”文件夹中的每个文件夹的邮件最大数量Maximum number of messages per folder in the Recoverable Items folder 无限制No limit 3 百万3 million 3 百万3 million 3 百万3 million
主邮箱(未处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in primary mailbox (not on hold) 30 GB30 GB 30 GB30 GB 30 GB30 GB 30 GB30 GB
主邮箱(处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in primary mailbox (on hold) 100 GB100 GB 100 GB100 GB 100 GB100 GB 100 GB100 GB
存档邮箱(未处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in archive mailbox (not on hold) 30 GB30 GB 30 GB30 GB 30 GB30 GB 30 GB30 GB
存档邮箱(处于保留状态)中“可恢复的项目”文件夹的存储配额Storage quota for Recoverable Items folder in archive mailbox (on hold) 100 GB2100 GB2 100 GB2100 GB2 Unlimited3Unlimited3 Unlimited3Unlimited3
“可恢复邮件”文件夹中的每个文件夹的邮件数量警告Warning for number of messages per folder in the Recoverable Items folder 无限制No limit 2.75 百万2.75 million 2.75 百万2.75 million 2.75 百万2.75 million
每个邮箱文件夹的子文件夹的最大数量Maximum number of subfolders per mailbox folder 无限制No limit 10001000 10001000 10001000
每个邮箱文件夹的子文件夹数量的警告Warning for number of subfolders per mailbox folder 无限制No limit 900900 900900 900900
最大文件夹层次结构深度Maximum folder hierarchy depth 无限制No limit 300300 300300 300300
文件夹层次结构深度的警告Warning for folder hierarchy depth 无限制No limit 250250 250250 250250
公用文件夹最大数Maximum number of public folders 1,000,0001,000,000 100,000100,000 100,000100,000 不可用Not available
每个公用文件夹的子文件夹的最大数量Maximum number of subfolders per public folder 不适用N/A 1,0001,000 1,0001,000 不可用Not available
每个公用文件夹的子文件夹数量的警告Warning for number of subfolders per public folder 不适用N/A 900900 900900 不可用Not available

备注

1 Microsoft 建议每个邮箱文件夹不超过 1,000,000 封邮件。1 Microsoft recommends no more than 1,000,000 messages per mailbox folder. >
2 这是可恢复项目文件夹的存储配额,而非整个存档邮箱的配额。2 This is the storage quota for the Recoverable Items folder, not the quota for the entire archive mailbox. 对于拥有 Exchange Online 套餐 2 许可证的用户或者拥有 Exchange Online 套餐 1 和 Exchange Online Archiving 许可证的用户,存档邮箱的存储配额没有限制。The storage quota for the archive mailbox is unlimited for users with an Exchange Online Plan 2 license or for users who have both an Exchange Online Plan 1 and an Exchange Online Archiving license. 有关提高可恢复项目配额的信息,请参阅提高保留邮箱的可恢复项目配额For information about increasing the Recoverable Items quota, see Increase the Recoverable Items quota for mailboxes on hold.
3 存档邮箱中的可恢复项目文件夹的初始存储配额为 100 GB。3 The initial storage quota for the Recoverable Items folder in an archive mailbox is 100 GB. 启用自动扩展存档后,只要达到“可恢复的项目”文件夹的存储容量,就会自动添加额外存储空间。When auto-expanding archiving is turned on, additional storage is automatically added when the storage capacity for the Recoverable Items folder is reached. 有关详细信息,请参阅 在 Office 365 中不受限制地存档概述For more information, see Overview of unlimited archiving in Office 365. 有关自动扩展存档可用性的详细信息,请参阅 Microsoft 365 路线图See the Microsoft 365 Roadmap for details about availability of auto-expanding archiving.

邮件限制Message limits

下列限制适用于每封电子邮件。The following limits are applied to every email message.

  • 邮件大小限制:需要邮件大小限制,以防止较大的邮件阻止传递其他邮件,并影响所有用户的服务性能。Message size limit: Message size limits are necessary to prevent large messages from blocking delivery of other messages and affecting service performance for all users. 这些限制包括一些附件,并且适用于组织范围的所有邮件(入站、出站和内部)。These limits include attachments, and apply organization-wide to all messages (inbound, outbound, and internal). 将不送达超过该限制的邮件,同时发件人将收到未送达报告 (NDR)。Messages larger than this limit will not be delivered, and the sender will receive a non-delivery report (NDR). 尽管可以向上、向下或按每个用户配置邮件大小限制,但管理员仍可以创建传输规则以限制任何单个附件的最大大小。While message size limits can be configured up, down, or on a per-user basis, administrators can also create transport rules to limit the maximum size of any individual attachment. 若要了解详细信息,请参阅 Microsoft 支持更大的电子邮件To learn more, see Microsoft supports larger email messages.

    备注

    某些电子邮件客户端的邮件大小限制可能较低,或者可能将单个文件附件的大小限制为小于 Exchange Online 邮件大小限制的值。Some email clients may have lower message size limits or may limit the size of an individual file attachment to a value that is less than the Exchange Online message size limit.

  • 邮件头大小限制:指定邮件中所有邮件头字段的最大大小。Message header size limit: Specifies the maximum size of all message header fields in a message. 当前限制为 256 KB。The current limit is 256 KB. 如果所有邮件头的总大小超过 256 KB,则 Exchange Online 将会拒绝邮件,并显示错误消息“552 5.3.4 邮件头大小超过固定的最大大小”。If the total size of all message headers exceeds 256 KB, Exchange Online will reject the message with error "552 5.3.4 Header size exceeds fixed maximum size." 不考虑邮件正文或附件的大小。The size of the message body or attachments isn't considered. 因为邮件头字段是纯文本,所以邮件头的大小由每个邮件头的字符数和邮件头字段的总数确定。Because the header fields are plain text, the size of the header is determined by the number of characters in each header field and by the total number of header fields. 每个文本字符占用 1 字节。Each text character consumes 1 byte.

  • 主题长度限制:电子邮件主题行中允许的最大文本字符数。Subject length limit: The maximum number of text characters allowed in the subject line of an email message.

  • 文件附件限制:电子邮件中允许的最大文件附件数。File attachments limit: The maximum number of file attachments allowed in an email message. 即使所有文件附件的总大小并不违反邮件大小限制,邮件中允许的附件数量也仍具有限制。Even if the total size of all the file attachments doesn't violate the message size limit, there is still a limit on how many attachments are allowed in the message. 限制由多部分邮件限制进行控制。This limit is controlled by the multipart message limit.

  • 文件附件大小限制:单个附件的最大文件大小。File attachment size limit: The maximum file size of a single attachment.

    备注

    此为单个附件的最大文件大小。This is the maximum file size of a single attachment. 单个客户端程序(包括 web 上的 Outlook)可能会限制此最大附件的大小。Individual client programs, including Outlook on the web, may limit the size of attachments below this maximum. Exchange ActiveSync 不基于个别附件实施附件大小限制。Exchange ActiveSync does not implement attachment size limits on an individual attachment basis. Exchange ActiveSync 邮件的所有附件总大小必须低于邮件大小限制。The total size of all attachments to an Exchange ActiveSync message must be less than the message size limit.

  • 多部分邮件限制: MIME 多部分邮件中允许的邮件正文部分的最大数量。Multipart message limit: The maximum number of message body parts that are allowed in a MIME multipart message. 此限制还会控制邮件中允许的文件附件的最大数量。This limit also controls the maximum number of file attachments that are allowed in a message.

  • 嵌入邮件深度限制:电子邮件中允许的最大转发电子邮件数。Embedded message depth limit: The maximum number of forwarded email messages that are allowed in an email message.

邮件限制Message limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
邮件大小限制 - OutlookMessage size limit - Outlook 150 MB1, 2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1, 2150 MB1, 2
邮件大小限制 - OWAMessage size limit - OWA 112 MB1, 3112 MB1, 3 112 MB1、3112 MB1, 3 112 MB1、3112 MB1, 3 112 MB1、3112 MB1, 3 112 MB1、3112 MB1, 3 112 MB1、3112 MB1, 3
邮件大小限制 - Outlook for MacMessage size limit - Outlook for Mac 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2 150 MB1、2150 MB1, 2
邮件大小限制 - 迁移Message size limit - migration 150 MB 1, 4150 MB 1, 4 150 MB 1, 4150 MB 1, 4 150 MB 1, 4150 MB 1, 4 150 MB 1, 4150 MB 1, 4 150 MB 1, 4150 MB 1, 4 150 MB 1, 4150 MB 1, 4
邮件大小限制-Outlook for iOS 和 Outlook for AndroidMessage size limit - Outlook for iOS and Android 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB
加密邮件的大小限制(针对使用包含新功能的 Office 365 邮件加密的订阅服务器)5Size limit for encrypted messages (for subscribers using Office 365 Message Encryption with new capabilities)5 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB
加密邮件的大小限制(针对使用旧版 Office 365 邮件加密的订阅服务器)5Size limit for encrypted messages (for subscribers using Office 365 Message Encryption legacy version)5 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB
主题长度限制Subject length limit 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters
文件附件限制File attachments limit 250 个附件250 attachments 250 个附件250 attachments 250 个附件250 attachments 250 个附件250 attachments 250 个附件250 attachments 250 个附件250 attachments
文件附件大小限制 - OutlookFile attachment size limit - Outlook 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB
文件附件大小限制 - OWAFile attachment size limit - OWA 112 MB3、6112 MB3, 6 112 MB3、6112 MB3, 6 112 MB3、6112 MB3, 6 112 MB3、6112 MB3, 6 112 MB3、6112 MB3, 6 112 MB3、6112 MB3, 6
文件附件大小限制 - Outlook for MacFile attachment size limit - Outlook for Mac 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB
文件附件大小限制-Outlook for iOS 和 Outlook for AndroidFile attachment size limit - Outlook for iOS and Android 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB
多部分邮件限制Multipart message limit 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts
邮件嵌入深度限制Embedded message depth limit 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages

备注

1 Microsoft 邮箱的默认最大邮件大小为 25 MB。1 The default maximum message size for Microsoft mailboxes is 25 MB. Microsoft 管理员可以指定介于 1 MB 和 150 MB 之间的自定义限制。Microsoft administrators can specify a custom limit between 1 MB and 150 MB. 不过,你可以发送或接收的邮件大小还取决于你的电子邮件客户端或解决方案的支持范围。However, the size of message you can send or receive also depends on what your email client or solution supports. 有关为您的组织自定义允许的最大邮件大小的详细信息,请参阅 Microsoft 支持更大的电子邮件For more information about customizing the maximum allowed message size for your organization, see Microsoft supports larger email messages.
2 您可以在用户之间发送和接收最高 150 MB 的邮件, (邮件永远不会离开 Microsoft 数据中心) 。2 You can send and receive up to 150 MB messages between users (where the message never leaves the Microsoft datacenters). 在 Microsoft 数据中心之外路由的邮件可能会增加33% 的翻译编码,在这种情况下,最大邮件大小为 112 MB。Messages that are routed outside of the Microsoft datacenters are subject to an additional 33% translation encoding increase, in which case the maximum message size is 112 MB.
3 OWA 帐户可能会导致您的邮件受到33% 编码的增加,并将邮件大小限制为低于配置的设置的25%。 3 OWA accounts for the possibility that your message may be subject to the 33% encoding increase and restricts the size of message you can send to 25% less than the configured setting. 例如,如果将设置自定义为 100 MB 最大邮件大小,则你可以发送不超过 75 MB 的邮件。For example, if you customize your settings for a 100 MB maximum message size, you can send messages no larger than 75 MB.
4 要移至 Exchange Online 的邮件大小由 Exchange Online 计算。4 The size of messages to be moved into Exchange Online are computed by Exchange Online. Exchange Server 2013 之前的 Exchange 版本可能会报告较小的邮件大小。Versions of Exchange prior to Exchange Server 2013 may report a smaller item size. 此限制适用于使用任何受支持的 Exchange 邮箱复制服务的基于移动的迁移。This limit applies to move-based migrations using any supported Exchange Mailbox Replication Service. (转换、暂存、IMAP、PST) 和其他第三方工具的其他迁移方法受常规邮件大小限制的限制。Other migration methods (Cutover, Staged, IMAP, PST) and other third-party tools are limited by the general message size limit.
5 有关具有新功能的 OME 的信息,请参阅 设置基于 Azure 信息保护基础构建的新 Office 365 邮件加密功能 5 For information about OME with new capabilities, see Set up new Office 365 Message Encryption capabilities built on top of Azure Information Protection.
6 经典文件附件的限制为 112 MB,但 OneDrive 文件附件最高可达 2 GB。 6 Classic file attachments have a limit of 112 MB, but OneDrive file attachments can be up to 2 GB.

跨独立选项的邮件限制Message limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
邮件大小限制 - OutlookMessage size limit - Outlook 10 MB410 MB4 150 MB1, 2150 MB1, 2 150 MB1, 2150 MB1, 2 150 MB2150 MB2
邮件大小限制 - OWAMessage size limit - OWA 10 MB410 MB4 112 MB1、3112 MB1, 3 112 MB1、3112 MB1, 3 150 MB1、2150 MB1, 2
邮件大小限制 - Outlook for MacMessage size limit - Outlook for Mac 10 MB410 MB4 150 MB150 MB 150 MB150 MB
邮件大小限制 - 迁移Message size limit - migration 不适用Not applicable 150 MB 5150 MB 5 150 MB 5150 MB 5 150 MB 5150 MB 5
邮件大小限制-Outlook for iOS 和 Outlook for AndroidMessage size limit - Outlook for iOS and Android 25 MB25 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB
加密邮件的大小限制(针对使用包含新功能的 Office 365 邮件加密的订阅服务器)6Size limit for encrypted messages (for subscribers using Office 365 Message Encryption with new capabilities)6 150 MB150 MB 150 MB150 MB 150 MB150 MB 150 MB150 MB
加密邮件的大小限制(针对使用旧版 Office 365 邮件加密的订阅服务器)6Size limit for encrypted messages (for subscribers using Office 365 Message Encryption legacy version)6 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB
主题长度限制Subject length limit 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters 255 个字符255 characters
文件附件限制File attachments limit 1024 attachments41024 attachments4 250 个附件250 attachments 250 个附件250 attachments 250 个附件250 attachments
文件附件大小限制 - OutlookFile attachment size limit - Outlook 35 MB435 MB4 150 MB150 MB 150 MB150 MB 150 MB150 MB
文件附件大小限制 - OWAFile attachment size limit - OWA 35 MB435 MB4 112 MB3112 MB3 112 MB3112 MB3 112 MB3112 MB3
文件附件大小限制 - Outlook for MacFile attachment size limit - Outlook for Mac 35 MB435 MB4 150 MB150 MB 150 MB150 MB 35 MB35 MB
文件附件大小限制-Outlook for iOS 和 Outlook for AndroidFile attachment size limit - Outlook for iOS and Android 25 MB25 MB 33 MB33 MB 33 MB33 MB 33 MB33 MB
多部分邮件限制Multipart message limit 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts 250 个部分250 parts
邮件嵌入深度限制Embedded message depth limit 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages 30 封嵌入邮件30 embedded messages

备注

1 Microsoft 管理员可以指定介于 1 mb 和 150 mb 之间的自定义限制。1 Microsoft administrators can specify a custom limit between 1 MB and 150 MB. 不过,你可以发送或接收的邮件大小还取决于你的电子邮件客户端或解决方案的支持范围。However, the size of message you can send or receive also depends on what your email client or solution supports. 有关为您的组织自定义允许的最大邮件大小的详细信息,请参阅 Microsoft 支持更大的电子邮件For more information about customizing the maximum allowed message size for your organization, see Microsoft supports larger email messages.
2 您可以在用户之间发送和接收最高 150 MB 的邮件, (邮件永远不会离开 Microsoft 数据中心) 。2 You can send and receive up to 150 MB messages between users (where the message never leaves the Microsoft datacenters). 在 Microsoft 数据中心之外路由的邮件可能会增加33% 的翻译编码,在这种情况下,最大邮件大小为 112 MB。Messages that are routed outside of the Microsoft datacenters are subject to an additional 33% translation encoding increase, in which case the maximum message size is 112 MB.
3 OWA 帐户可能会导致您的邮件受到33% 编码的增加,并将邮件大小限制为低于配置的设置的25%。 3 OWA accounts for the possibility that your message may be subject to the 33% encoding increase and restricts the size of message you can send to 25% less than the configured setting. 例如,如果将设置自定义为 100 MB 最大邮件大小,则你可以发送不超过 75 MB 的邮件。For example, if you customize your settings for a 100 MB maximum message size, you can send messages no larger than 75 MB.
4 这是 Exchange Server 2013 组织的默认限制。 4 This is the default limit for Exchange Server 2013 organizations. 管理员可以为其组织更改此值。Administrators can change this value for their organization.
5 要移到 exchange online 中的邮件的大小由 Exchange online 计算。 5 The size of messages to be moved into Exchange Online are computed by Exchange Online. Exchange Server 2013 之前的 Exchange 版本可能会报告较小的项目大小。Versions of Exchange prior to Exchange Server 2013 may report a smaller item size.
6 有关具有新功能的 OME 的信息,请参阅 设置基于 Azure 信息保护基础构建的新 Office 365 邮件加密功能 6 For information about OME with new capabilities, see Set up new Office 365 Message Encryption capabilities built on top of Azure Information Protection.

接收和发送限制Receiving and sending limits

接收和发送限制可用于防止出现垃圾邮件和大量邮件蠕虫或病毒。这些限制可以帮助保护系统的运行状况和我们用户的安全。Receiving and sending limits are applied to combat spam and mass-mailing worms or viruses. These limits help to protect the health of our systems and keep our users safe.

接收限制Receiving limits

接收限制应用于用户、组或公用文件夹每小时可以接收的邮件数。Receiving limits apply to the number of messages that a user, group, or public folder can receive per hour. 这适用于从 internet 接收的和本地服务器上的邮件。This applies for both messages received from the internet and from on-premises servers. 超出接收限制时,只要有电子邮件发送到此邮箱,都会收到未送达报告,指出邮箱已超出最大发送阈值。When the receiving limit has been exceeded, any emails sent to that mailbox will receive a non-delivery report stating that the mailbox has exceeded the maximum delivery threshold. 一个小时后,限制会进行刷新,邮箱将能够再次接收邮件。After one hour, the limit will refresh and the mailbox will once again be able to receive messages.

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版 OfficeMicrosoft 365 Business Standard Office Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
接收的邮件数Messages received 每小时 3,600 封邮件3,600 messages per hour 每小时 3,600 封邮件3,600 messages per hour 每小时 3,600 封邮件3,600 messages per hour 每小时 3,600 封邮件3,600 messages per hour 每小时 3600 封邮件3600 messages per hour 每小时 3600 封邮件3600 messages per hour

发送限制Sending limits

发送限制应用于收件人数、邮件数和用户可以从其 Exchange Online 帐户发送的每封邮件的收件人数。Sending limits apply to the number of recipients, number of messages, and number of recipients per message that a user can send from their Exchange Online account.

备注

对于存储在组织的通讯簿中的通讯组,这类组计数为一个收件人。对于存储在邮箱的“联系人”文件夹中的通讯组,单独计数组的各个成员。For distribution groups stored in an organization's address book, the group is counted as one recipient. For distribution groups stored in the Contacts folder of a mailbox, the members of the group are counted individually.

  • 收件人速率限制:为了防止传递未经请求的批量邮件,Exchange Online 具有限制用户和应用程序发送大量电子邮件的收件人限制。Recipient rate limit: To discourage the delivery of unsolicited bulk messages, Exchange Online has recipient limits that prevent users and applications from sending large volumes of email. 这些限制适用于每个用户的所有出站和内部邮件。These limits are applied per-user to all outbound and internal messages.

    备注

    需要发送合法批量电子邮件的 Exchange Online 客户(例如,客户新闻通讯)应使用专门提供这些服务的第三方提供商。Exchange Online customers who need to send legitimate bulk commercial email (for example, customer newsletters) should use third-party providers that specialize in these services.

  • 收件人限制:这是单个电子邮件的 "收件人:"、"抄送:" 和 "密件抄送:" 字段中允许的最大收件人数。Recipient limit: This is the maximum number of recipients allowed in the To:, Cc:, and Bcc: fields for a single email message.

    备注

    出于收件人速率限制和收件人限制的目的,组织共享通讯簿中存储的通讯组作为一个收件人计数。在个人通讯列表中,每个收件人单独计数。For the purposes of the recipient rate limit and the recipient limit, a distribution group that is stored in the organization's shared address book counts as one recipient. In a personal distribution list, each recipient is counted separately.

  • 收件人代理地址限制:收件人代理地址限制是收件人邮箱可以) 的最大别名 (电子邮件地址数。Recipient proxy address limit: The recipient proxy address limit is the maximum number of aliases (email addresses) that a recipient mailbox can have.

  • 邮件速率限制:邮件速率限制确定用户可以从其 Exchange Online 帐户在指定时间段内发送的邮件数。Message rate limit: Message rate limits determine how many messages a user can send from their Exchange Online account within a specified period of time. 此限制有助于单个发件人避免对系统资源进行过度消耗。This limit helps prevent over consumption of system resources by a single sender. 如果用户提交邮件的速度超过了通过 SMTP 客户端提交邮件的限制,邮件将被拒绝,并且客户端将需要重试。If a user submits messages at a rate that exceeds the limit via SMTP client submission, the messages will be rejected and the client will need to retry.

发送限制Sending limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
收件人速率限制1Recipient rate limit1 每天 10,000 个收件人10,000 recipients per day 每天 10,000 个收件人10,000 recipients per day 每天 10,000 个收件人10,000 recipients per day 每天 10,000 个收件人10,000 recipients per day 每天 10,000 个收件人10,000 recipients per day 每天 10,000 个收件人10,000 recipients per day
收件人限制2Recipient limit2 可自定义为1000个收件人Customizable up to 1000 recipients 可自定义为1000个收件人Customizable up to 1000 recipients 可自定义为1000个收件人Customizable up to 1000 recipients 可自定义为1000个收件人Customizable up to 1000 recipients 可自定义为1000个收件人Customizable up to 1000 recipients 可自定义为1000个收件人Customizable up to 1000 recipients
收件人代理服务器地址限制Recipient proxy address limit 400400 400400 400400 400400 400400 400400
邮件速率限制Message rate limit 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute

备注

1 达到收件人速率限制后,将无法从邮箱发送邮件,直到在过去24小时内发送的邮件的收件人数低于限制。1 After the recipient rate limit is reached, messages can't be sent from the mailbox until the number of recipients that were sent messages in the past 24 hours drops below the limit. 例如,用户在 09:00 am 向5000收件人发送一封电子邮件,然后将另一封2500邮件发送给在上午10:00 的收件人,然后将另一封邮件发送给位于 2500 AM 的11:00 收件人,从而达到10000邮件的限制。For example, a user sends an email message to 5000 recipients at 09:00 AM, then sends another message to 2500 recipients at 10:00 AM, and then sends another message to 2500 recipients at 11:00 AM, hitting the limit of 10,000 messages. 用户将无法再次发送邮件,直到下一天的 09:00 AM。The user won't be able to send messages again until 09:00 AM the next day. 2 可以为现有邮箱和将来将创建的新邮箱自定义介于1和1000之间的收件人限制。2 You can customize recipient limits between 1 and 1000 for existing mailboxes and for new mailboxes that will be created in the future. 使用 Exchange 管理中心单独或批量编辑现有邮箱的收件人限制,并通过远程 PowerShell 自定义新邮箱的默认设置。Edit the recipient limit on existing mailboxes individually or in bulk using the Exchange admin center and customize the default setting for new mailboxes via Remote PowerShell. 有关详细信息,请参阅 Office 365 中的可自定义收件人限制For more information, see Customizable recipient limits in Office 365.

跨独立选项的发送限制Sending limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
收件人速率限制Recipient rate limit 无限制1No limit1 每日10000收件人210,000 recipients per day2 每日10000收件人210,000 recipients per day2 每日10000收件人210,000 recipients per day2
收件人限制Recipient limit 1000个收件人11000 recipients1 1000收件人1000 recipients 1000收件人1000 recipients 1000收件人1000 recipients
收件人代理服务器地址限制Recipient proxy address limit 400400 400400 400400 400400
邮件速率限制Message rate limit 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute 每分钟 30 封邮件30 messages per minute

备注

1 这是 Exchange Server 2013 组织的默认限制。1 This is the default limit for Exchange Server 2013 organizations. 管理员可以为其组织更改此值。Administrators can change this value for their organization.
2 达到收件人速率限制后,将无法从邮箱发送邮件,直到在过去24小时内发送的邮件的收件人数低于限制。2 After the recipient rate limit is reached, messages can't be sent from the mailbox until the number of recipients that were sent messages in the past 24 hours drops below the limit. 例如,用户在 09:00 am 向5000收件人发送一封电子邮件,然后将另一封2500邮件发送给在上午10:00 的收件人,然后将另一封邮件发送给位于 2500 AM 的11:00 收件人,从而达到10000邮件的限制。For example, a user sends an email message to 5000 recipients at 09:00 AM, then sends another message to 2500 recipients at 10:00 AM, and then sends another message to 2500 recipients at 11:00 AM, hitting the limit of 10,000 messages. 用户将无法再次发送邮件,直到下一天的 09:00 AM。The user won't be able to send messages again until 09:00 AM the next day.

报告和邮件跟踪限制Reporting and message trace limits

有关报告和邮件跟踪限制,请参阅 Exchange Online Protection 中的报告和邮件跟踪中的 "报告和邮件跟踪数据可用性和延迟" 部分。For reporting and message trace limits, see the "Reporting and message trace data availability and latency" section in Reporting and message trace in Exchange Online Protection.

保留限制Retention limits

这些限制控制可以访问收件箱中特定文件夹中的项目的时间长度。These limits control the length of time that items in specific folders in the Inbox can be accessed.

  • "已删除邮件" 文件夹保留期:项目在被自动删除之前可在 "已删除邮件" 文件夹中保留的最大天数。Deleted Items folder retention period: The maximum number of days that items can remain in the Deleted Items folder before they're automatically removed.

  • 从 "已删除邮件" 文件夹中删除的项目的保留期:从 "已删除邮件" 文件夹中删除的项目在被永久删除之前保留的最大天数。Retention period for items removed from the Deleted Items folder: The maximum numbers of days that items removed from the Deleted Items folder are retained before they're permanently deleted.

  • 垃圾邮件文件夹保留期:项目在被自动删除之前可在 "垃圾邮件" 文件夹中保留的最大天数。Junk Email folder retention period: The maximum number of days that items can remain in the Junk Email folder before they're automatically removed.

备注

软删除的用户邮箱 — 使用 Microsoft 365 管理中心或在 Exchange Online PowerShell 中的 Remove-邮箱 cmdlet 删除的邮箱,且仍在 Azure Active Directory 回收站中的邮箱 — 可在30天内恢复。A soft-deleted user mailbox—a mailbox deleted using the Microsoft 365 admin center or the Remove-Mailbox cmdlet in Exchange Online PowerShell and that is still in the Azure Active Directory recycle bin—is recoverable within 30 days.

保留限制Retention limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
“已删除邮件”文件夹保留期Deleted Items folder retention period 无限制1No limit1 无限制1No limit1 无限制1No limit1 无限制1No limit1 无限制1No limit1 无限制1No limit1
从“已删除邮件”文件夹中删除的邮件的保留期Retention period for items removed from the Deleted Items folder 14 天114 days1 14 天114 days1 14 天114 days1 14 天114 days1 14 天114 days1 14 天114 days1
“垃圾邮件”文件夹保留期Junk Email folder retention period 30 天30 days 30 天30 days 30 天30 days 30 天30 days 30 天30 days 30 天30 days

备注

1 这是 Microsoft 365 组织的默认值。1 This is the default value for Microsoft 365 organizations. 管理员可以将其组织中的邮箱的此值更改为最大 30 天。Administrators can change this value to a maximum of 30 days for mailboxes in their organization.

跨独立选项的保留限制Retention limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
“已删除邮件”文件夹保留期Deleted Items folder retention period 无限制1No limit1 无限制1No limit1 无限制1No limit1 无限制1No limit1
从“已删除邮件”文件夹中删除的邮件的保留期Retention period for items removed from the Deleted Items folder 14 天114 days1 14 天214 days2 14 天214 days2 14 天214 days2
“垃圾邮件”文件夹保留期Junk Email folder retention period 2 年12 years1 30 天30 days 30 天30 days 30 天30 days

备注

1 这是默认限制。管理员可以为其组织更改此值。1 This is the default limit. Administrators can change this value for their organization.
2 这是 Exchange Online 组织的默认值。2 This is the default value for Exchange Online organizations. 管理员可以将其组织中的邮箱的此值更改为最大 30 天。Administrators can change this value to a maximum of 30 days for mailboxes in their organization.

通讯组限制Distribution group limits

这些限制适用于组织的共享地址簿中的通讯组。These limits apply to distribution groups in your organization's shared address book.

  • 通讯组成员的最大数量:在通讯组扩展后确定总收件人数。Maximum number of distribution group members: The total recipient count is determined after distribution group expansion.

  • 限制向大型通讯组发送邮件:包含此限制指定的成员数量的通讯组必须配置了传递管理或邮件审批选项。Limit sending messages to large distribution groups: Distribution groups that contain the number of members specified by this limit must have delivery management or message approval options configured. 传递管理选项将指定一个允许向通讯组发送邮件的发件人的列表。Delivery management specifies a list of senders who are allowed to send messages to the distribution group. 邮件审批选项将指定一个或多个必须审批发送到通讯组的所有邮件的审阅人。Message approval specifies one or more moderators who must approve all messages sent to the distribution group.

  • 大型通讯组的最大邮件大小:如果邮件发送给5000或更多收件人,则邮件大小不能超过此限制。Maximum message size for large distribution groups: If a message is sent to 5,000 or more recipients, the message size can't exceed this limit. 如果此邮件的大小超出此限制,则不会传递此邮件,并且发件人会收到一份未送达报告 (NDR)。If the message size exceeds the limit, the message isn't delivered, and the sender receives a non-delivery report (NDR).

通讯组限制Distribution group limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
通讯组成员的最大数目1Maximum number of distribution group members1 100,000 个成员100,000 members 100,000 个成员100,000 members 100,000 个成员100,000 members 100,000 个成员100,000 members 100,000 个成员100,000 members 100,000 个成员100,000 members
限制向大型通讯组发送邮件Limit sending messages to large distribution group 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members
拥有 5,000 到 99,999 个成员的分配组的最大邮件大小Maximum message size for distribution groups with 5,000 to 99,999 members 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB 25 MB25 MB
拥有 100,000 个成员的分配组的最大邮件大小Maximum message size for distribution groups with 100,000 members 5 MB5 MB 5 MB5 MB 5 MB5 MB 5 MB5 MB 5 MB5 MB 5 MB5 MB
通讯组所有者的最大数量Maximum number of distribution group owners 10 10 10 10 10 10 10 10 10 10 10 10
用户可创建的组的最大数目Maximum number of groups a user can create 300,0002300,0002 300,0002300,0002 300,0002300,0002 300,0002300,0002 300,0002300,0002 300,0002300,0002

备注

1 如果您正在使用 Azure Active Directory DirSync,您可以从您的本地 Active Directory 同步到 Azure Active Directory 的分发组成员的最大数量是 15,000。1 If you are using Azure Active Directory DirSync, the maximum number of distribution group members that you can synchronize from your on-premises Active Directory to Azure Active Directory is 15,000. 如果您正在使用 Azure AD Connect,该数字为 50,000。If you are using Azure AD Connect, that number is 50,000.
2 此限制也适用于管理员。2 This limit also applies to admins.

跨独立选项的通讯组限制Distribution group limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
通讯组成员的最大数目Maximum number of distribution group members 100,000 个成员1100,000 members1 100,000 个成员100,000 members 100,000 个成员100,000 members 100,000 个成员100,000 members
限制向大型通讯组发送邮件Limit sending messages to large distribution group 5,000 个成员或更多成员15,000 or more members1 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members 5,000 个成员或更多成员5,000 or more members
通讯组所有者的最大数量Maximum number of distribution group owners 10 10 10 10 10 10 10 10
用户可创建的组的最大数目Maximum number of groups a user can create 25022502 25022502 25022502 25022502

备注

1 这是 Exchange Server 2013 组织的默认限制。1 This is the default limit for Exchange Server 2013 organizations. 管理员可以为其组织更改此值。Administrators can change this value for their organization.
2 此限制也适用于管理员。2 This limit also applies to admins.

日记、传输和收件箱规则限制Journal, transport, and inbox rule limits

以下列表包含适用于日记规则的限制,传输规则 (也称为组织范围的规则) 和应用于收件箱规则的限制。The following list includes limits that apply to journal rules, transport rules (also known as organization-wide rules), and limits that apply to inbox rules. 收件箱规则由单个用户设置,并适用于该用户邮箱发送和接收的邮件。Inbox rules are set up by individual users and applied to messages sent and received by the individual user's mailbox.

  • 日记规则的最大数量:组织中可存在的日记规则的最大数量。Maximum number of journal rules: The maximum number of journal rules that can exist in the organization.

  • 传输规则的最大数量:组织中可存在的规则的最大数量。Maximum number of transport rules: The maximum number of rules that can exist in the organization.

  • 单个传输规则的最大大小:单个传输规则中可使用的最大字符数。Maximum size of an individual transport rule: The maximum number of characters that can be used in a single transport rule. The characters are used in the conditions, exceptions, and actions.The characters are used in the conditions, exceptions, and actions.

  • 所有传输规则中使用的所有正则表达式的字符限制:使用的总字符数,包括组织中所有传输规则条件和例外中的所有正则表达式。Character limit for all regular expressions used in all transport rules: The total number of characters used including all the regular expressions in all the transport rule conditions and exceptions in the organization. 可具有少量使用长而复杂的正则表达式的规则,也可具有多个使用简单正则表达式的规则。You can have a few rules that use long and complex regular expressions, or you can have many rules that use simple regular expressions.

  • 对附件内容的扫描限制:传输规则条件允许您检查邮件附件的内容,但只检查从附件提取的前 1 MB 文本。Scanning limits for attachment content: The transport rule conditions let you examine the content of message attachments, but only the first 1 MB of the text extracted from an attachment is inspected. 1 MB 的限制指的是从附件中提取的文本,而不是附件的文件大小。This 1 MB limit refers to the text extracted from the attachment, not to the file size of the attachment. 例如,一个 2 MB 的文件可能包含小于 1 MB 的文本,因此将检查整个文本。For example, a 2 MB file may contain less than 1 MB of text, so all of the text would be inspected.

  • 所有传输规则添加到邮件的收件人的最大数量:当不同传输规则对邮件进行处理时,只有有限数量的收件人可以添加到邮件中。Maximum number of recipients added to a message by all transport rules: When a message is acted on by different transport rules, only a finite number of recipients can be added to the message. 在达到此限制后,不会再向该邮件添加任何其余的收件人。After the limit is reached, any remaining recipients aren't added to the message. 此外,传输规则不能向邮件添加通讯组。Also, distribution groups can't be added to a message by a transport rule.

  • 转发邮件限制:可以使用重定向操作为收件箱或传输规则配置的最大收件人数。Forwardee limit: The maximum number of recipients that can be configured for an inbox or transport rule with a redirecting action. 如果某个规则配置为将邮件重定向到比此数目多的收件人,则不应用该规则,任何满足该规则条件的邮件将不重定向到该规则中列出的任何收件人。If a rule is configured to redirect a message to more than this number of recipients, the rule won't be applied and any message that satisfies the rule condition won't be redirected to any of the recipients listed in the rule.

  • 重定向邮件的次数:邮件将根据收件箱规则自动重定向、转发或答复的次数。Number of times a message is redirected: The number of times a message will be redirected, forwarded, or replied to automatically based on Inbox rules. 例如,用户 A 有一个根据发件人将邮件重定向到用户 B 的收件箱规则。For example, User A has an Inbox rule that redirects messages to User B, based on the sender. 用户 B 有一个根据主题行中的关键字将邮件转发到用户 C 的收件箱规则。User B has an Inbox rule that forwards messages to User C based on keywords in the subject line. 如果某邮件同时满足这两个条件,则由于仅允许一次重定向,该邮件仅发送到用户 B,不会转发到用户 C。If a message satisfies both of these conditions, the message is only sent to User B; it's not forwarded to User C because only one redirection is allowed. 在这种情况下,邮件将被丢弃,而不会向用户 B 发送未送达报告 (NDR) ,以表明该邮件未传递到用户 C。我们使用了 X MS--"收件箱" 规则-循环标头来确定邮件被重定向的次数。In this case, the message is dropped without sending a non-delivery report (NDR) to User B indicating that the message wasn't delivered to User C. We make use of the X-MS-Exchange-Inbox-Rules-Loop header to determine the number of times that a message was redirected. 此标头还会跨 Exchange 组织边界保留。This header remains also across Exchange organizational boundaries.

  • 传输规则重定向邮件的次数:将根据传输规则重定向邮件的次数。Number of times a message is redirected by transport rules: The number of times a message will be redirected based on transport rules. 例如,Exchange 组织 Tailspin 玩具有一个传输规则,用于将发送给用户 A 的每封邮件重定向到位于 Exchange 组织 Contoso 中的用户 B。For example, Exchange organization Tailspin Toys has a transport rule to redirect every message that was send to User A to User B which is located in Exchange organization Contoso. 在 Exchange 组织 Contoso 中,有一个传输规则,用于将发送给用户 B 的每封邮件重定向到位于 Exchange 组织 A Datum Corporation 的用户 C。Within Exchange organization Contoso there is a transport rule in place to redirect every message that was send to User B to User C which is located in Exchange organization A. Datum Corporation. 在这种情况下,邮件将被丢弃,未送达报告 (NDR) ,状态代码为,并拒绝邮件 550 5.7.128 传输。原则.RejectMessage超过了传输规则循环计数,邮件被拒绝 将发送给用户 A。我们使用了 X MS 交换-Rules-Loop 标头来确定传输规则重定向邮件的次数。In this case, the message is dropped and a non-delivery report (NDR) with status code and reject message 550 5.7.128 TRANSPORT.RULES.RejectMessage; Transport rules loop count exceeded and message rejected is send to User A. We make use of the X-MS-Exchange-Transport-Rules-Loop header to determine the number of times that a message was redirected by transport rules. 此标头还会跨 Exchange 组织边界保留。This header remains also across Exchange organizational boundaries.

日记、传输和收件箱规则限制Journal, transport, and inbox rule limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
日记规则的最大数目Maximum number of journal rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules
传输规则的最大数目Maximum number of transport rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules
单个传输规则的最大大小Maximum size of an individual transport rule 8 KB8 KB 8 KB8 KB 8 KB8 KB 8 KB8 KB 8 KB8 KB 8 KB8 KB
所有传输规则中使用的所有正则表达式的字符限制Character limit for all regular expressions used in all transport rules 20 KB20 KB 20 KB20 KB 20 KB20 KB 20 KB20 KB 20 KB20 KB 20 KB20 KB
附件内容的扫描限制Scanning limits for content of attachments 1 MB1 MB 1 MB1 MB 1 MB1 MB 1 MB1 MB 1 MB1 MB 1 MB1 MB
所有传输规则添加到邮件的收件人的最大数目Maximum number of recipients added to a message by all transport rules 100 位收件人100 recipients 100 位收件人100 recipients 100 位收件人100 recipients 100 位收件人100 recipients 100 位收件人100 recipients 100 位收件人100 recipients
转发邮件的收件人限制Forwardee limit 10 位收件人10 recipients 10 个收件人10 recipients 10 个收件人10 recipients 10 个收件人10 recipients 10 个收件人10 recipients 10 个收件人10 recipients
重定向邮件的次数Number of times a message is redirected 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection
传输规则重定向邮件的次数Number of times a message is redirected by transport rules 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection
重定向邮件的次数Number of times a message is redirected 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection
收件箱规则Inbox rule 256kb1256kb1 256kb1256kb1 256kb1256kb1 256kb1256kb1 256kb1256kb1 256kb1256kb1

备注

1 如果邮箱已迁移到 Exchange Online,则收件箱规则限制可能设置为低于默认 EXO 值的值。1 If a mailbox was migrated to Exchange Online, the inbox rule limit might be set to the value that is lower than the default EXO value. 如果是这种情况,则可以增加收件箱规则值。If that is the case, the inbox rule value can be increased. 有关说明,请参阅 在 Exchange Online 中修改收件箱规则使用的空间For instructions, see Modify the space used by Inbox rules in Exchange Online.

跨独立选项的日记、传输和收件箱规则限制Journal, transport, and inbox rule limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
日记规则的最大数目Maximum number of journal rules 无限制No limit 50规则50 rules 50规则50 rules 50规则50 rules
传输规则的最大数目Maximum number of transport rules 无限制No limit 300 条规则300 rules 300 条规则300 rules 300 条规则300 rules
单个传输规则的最大大小Maximum size of an individual transport rule 40 KB40 KB 8 KB8 KB 8 KB8 KB 8 KB8 KB
所有传输规则中使用的所有正则表达式的字符限制Character limit for all regular expressions used in all transport rules 无限制No limit 20 KB20 KB 20 KB20 KB 20 KB20 KB
所有传输规则添加到邮件的收件人的最大数目Maximum number of recipients added to a message by all transport rules 无限制No limit 100 位收件人100 recipients 100 位收件人100 recipients 100 位收件人100 recipients
转发邮件的收件人限制Forwardee limit 无限制No limit 10 个收件人10 recipients 10 个收件人10 recipients 10 个收件人10 recipients
重定向邮件的次数Number of times a message is redirected 3 次重定向3 redirections 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection
传输规则重定向邮件的次数Number of times a message is redirected by transport rules 无限制No limit 1 次重定向1 redirection 1 次重定向1 redirection 1 次重定向1 redirection

审阅限制Moderation limits

这些限制将控制用于适用于通讯组和传输规则的邮件审批的审阅设置。These limits control the moderation settings that are used for message approval applied to distribution groups and transport rules.

  • 仲裁邮箱的最大大小:如果仲裁邮箱超出此限制,则需要审批的邮件会在未送达报告 (NDR) 中返回给发件人。Maximum size of the arbitration mailbox: If the arbitration mailbox exceeds this limit, messages that require moderation are returned to the sender in a non-delivery report (NDR).

  • 最大审阅者数:可以分配给单个仲裁通讯组的审阅者的最大数目,也可以使用单个传输规则添加到邮件中。Maximum number of moderators: The maximum number of moderators that you can assign to a single moderated distribution group or that can be added to a message using a single transport rule. Note that you can't specify a distribution group as a moderator.Note that you can't specify a distribution group as a moderator.

  • 等待裁决的邮件的过期时间:默认情况下,等待审阅的邮件将在两天后过期。Expiration for messages waiting for moderation: By default, a message waiting for moderation expires after two days. 但每 7 天将处理一次已过期的中继邮件。However, the processing of expired moderated messages runs every seven days. 这意味着,中继邮件会在 2 到 9 天内随时过期。This means that a moderated message can expire at any time between two and nine days.

  • 过期裁决通知邮件的最大速率:此限制设置一小时内过期的仲裁邮件的最大通知邮件数。Maximum rate for expired moderation notification messages: This limit sets the maximum number of notification messages for expired moderated messages in a one-hour period. 对数据中心内的每个邮箱数据库施加了此限制。This limit is placed on each mailbox database in the datacenter.

在使用率较高的时段内,一些发件人可能无法收到已过期的中继邮件的通知邮件。但仍可使用送达报告来发现这些通知。During periods of heavy usage, some senders may not receive notification messages for moderated messages that have expired. However, these notifications are still discoverable using delivery reports.

审阅限制Moderation limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
仲裁邮箱的最大大小Maximum size of the arbitration mailbox 10 GB10 GB 10 GB10 GB 10 GB10 GB 10 GB10 GB 10 GB10 GB 10 GB10 GB
审阅人的最大数目Maximum number of moderators 10 个审阅人10 moderators 10 个审阅人10 moderators 10 个审阅人10 moderators 10 个审阅人10 moderators 10 个审阅人10 moderators 10 个审阅人10 moderators
等待审阅的邮件的过期时间Expiration for messages waiting for moderation 2 天2 days 2 天2 days 2 天2 days 2 天2 days 2 天2 days 2 天2 days
过期的审阅通知邮件的最大速率Maximum rate for expired moderation notification messages 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour

跨独立选项的审阅限制Moderation limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
仲裁邮箱的最大大小Maximum size of the arbitration mailbox 无限制1No limit1 10 GB10 GB 10 GB10 GB 10 GB10 GB
审阅人的最大数目Maximum number of moderators 无限制No limit 10 个审阅人10 moderators 10 个审阅人10 moderators 10 个审阅人10 moderators
等待审阅的邮件的过期时间Expiration for messages waiting for moderation 5 天15 days1 2 天2 days 2 天2 days 2 天2 days
过期的审阅通知邮件的最大速率Maximum rate for expired moderation notification messages 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour 每小时 300 个过期通知300 expiration notifications per hour

备注

1 这是 Exchange Server 2013 组织的默认限制。管理员可以为其组织更改此值。1 This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.

Exchange ActiveSync 限制Exchange ActiveSync limits

以下限制适用于 Microsoft Exchange ActiveSync,一个在移动设备和 Exchange 之间同步邮箱数据的客户端协议。The following limits apply to Microsoft Exchange ActiveSync, a client protocol that synchronizes mailbox data between mobile devices and Exchange.

  • Exchange activesync 设备限制:每个邮箱的 exchange activesync 设备的最大数量。Exchange ActiveSync device limit: The maximum number of Exchange ActiveSync devices per mailbox.

  • Exchange activesync 设备删除限制: exchange 管理员可在单个月中删除的 exchange activesync 设备的最大数量。Exchange ActiveSync device deletion limit: The maximum number of Exchange ActiveSync devices that an Exchange administrator can delete in a single month.

Exchange ActiveSync 限制Exchange ActiveSync limits

功能Feature Microsoft 365 商业基础版Microsoft 365 Business Basic Microsoft 365 商业标准版Microsoft 365 Business Standard Office 365 企业版 E1Office 365 Enterprise E1 Office 365 企业版 E3Office 365 Enterprise E3 Office 365 企业版 E5Office 365 Enterprise E5 Office 365 企业版 F3Office 365 Enterprise F3
Exchange ActiveSync 设备限制Exchange ActiveSync device limit 100100 100100 100100 100100 100100 100100
Exchange ActiveSync 设备删除限制Exchange ActiveSync device deletion limit 2020 2020 2020 2020 2020 2020

独立选项中的 Exchange ActiveSync 限制Exchange ActiveSync limits across standalone options

功能Feature Exchange Server 2013Exchange Server 2013 Exchange Online 计划 1Exchange Online Plan 1 Exchange Online 计划 2Exchange Online Plan 2 Exchange Online KioskExchange Online Kiosk
Exchange ActiveSync 设备限制Exchange ActiveSync device limit 100100 100100 100100 100100
Exchange ActiveSync 设备删除限制Exchange ActiveSync device deletion limit 2020 2020 2020 2020