了解 Exchange 2016 中的 POP3 和 IMAP4 支持。POP3 and IMAP4

摘要: 概述 POP3 和 IMAP4,以及它们之间的差异。Summary: An overview of POP3 and IMAP4, and the differences between them.

默认情况下,Exchange Online 中的所有用户启用 POP3 和 IMAP4。By default, POP3 and IMAP4 are enabled for all users in Exchange Online.

用户可以使用任何支持 POP3 和 IMAP4 连接到 Exchange Online 的电子邮件程序。这些程序包括 Outlook、 Microsoft Outlook Express、 Entourage 和许多第三方程序,如 Mozilla Thunderbird 和 Eudora。支持的每个电子邮件客户端程序功能有所不同。有关特定的 POP3 和 IMAP4 客户端程序提供的功能的信息,请参阅包含与每个应用程序的文档。Users can use any email programs that support POP3 and IMAP4 to connect to Exchange Online. These programs include Outlook, Microsoft Outlook Express, Entourage, and many third-party programs, such as Mozilla Thunderbird and Eudora. The features supported by each email client programs vary. For information about features offered by specific POP3 and IMAP4 client programs, see the documentation that's included with each application.

POP3 和 IMAP4 提供访问 Exchange online 的基本电子邮件功能并允许访问脱机的电子邮件,但不提供丰富的电子邮件、 日历和联系人管理或当用户连接使用 Outlook,Exchange 时可用的其他功能ActiveSync、 Outlook Web App 或 Outlook Voice Access。POP3 and IMAP4 provide access to the basic email features of Exchange Online and allow for offline email access, but don't offer rich email, calendaring, and contact management, or other features that are available when users connect with Outlook, Exchange ActiveSync, Outlook Web App, or Outlook Voice Access.

备注

每次人访问基于 POP 或 IMAP 的电子邮件程序以打开他/她 Office 365 电子邮件,该用户将体验几秒钟的时间的延迟。使用代理服务器,其中介绍了身份验证其他跃点延迟结果。代理服务器首先查找分配的盒服务器 (客户端访问服务器),并针对,然后进行身份验证。Each time a person accesses a POP-based or IMAP-based email program to open his or her Office 365 email, that user will experience a delay of several seconds. The delay results from using a proxy server, which introduces an additional hop for authentication. The proxy server first looks up the assigned pod server (client access server) and then authenticates against that.

用户用于设置通过 POP3 或 IMAP4 访问其 Exchange Online 邮箱的设置Settings users use to set up POP3 or IMAP4 access to their Exchange Online mailboxes

后启用 POP3 和 IMAP4 客户端访问,您必须向用户提供信息下表中,以便他们可以其电子邮件程序连接到其 Exchange Online 邮箱。After you enable POP3 and IMAP4 client access, you have to give users the information in the following table so that they can connect their email programs to their Exchange Online mailboxes.

POP3 和 IMAP4 电子邮件程序不使用 POP3 和 IMAP4 电子邮件服务器发送消息。使用 POP3 和 IMAP4 的电子邮件程序依赖于发送邮件的 SMTP。POP3 and IMAP4 email programs don't use POP3 and IMAP4 to send messages to the email server. Email programs that use POP3 and IMAP4 rely on SMTP to send messages.

服务器名称Server name
PortPort
加密方法Encryption method
POP3POP3
Outlook.office365.comOutlook.office365.com
995995
TLSTLS
IMAP4IMAP4
Outlook.office365.comOutlook.office365.com
993993
TLSTLS
SMTPSMTP
Smtp.office365.comSmtp.office365.com
587587
TLSTLS

了解 POP3 和 IMAP4 的区别Understanding the differences between POP3 and IMAP4

默认情况下,当 POP3 电子邮件程序将电子邮件下载到客户端计算机后,下载的邮件会从服务器上删除。如果未在电子邮件服务器上保留用户电子邮件的副本,则用户无法从多台计算机上访问相同的电子邮件。不过,可以将某些 POP3 电子邮件程序配置为在服务器上保留邮件副本,以便可以从另一台计算机访问相同的电子邮件。POP3 客户端程序只能用于将邮件从电子邮件服务器下载到客户端计算机上的一个文件夹(通常为“收件箱”)。POP3 无法将电子邮件服务器上的多个文件夹与客户端计算机上的多个文件夹同步。POP3 也不支持公用文件夹访问。By default, when POP3 email programs download email messages to a client computer, the downloaded messages are removed from the server. When a copy of your user's email isn't kept on the email server, the user can't access the same email messages from multiple computers. However, some POP3 email programs can be configured to keep copies of the messages on the server so that the same email messages can be accessed from another computer. POP3 client programs can be used to download messages from the email server to only a single folder (usually, the Inbox) on the client computer. POP3 can't synchronize multiple folders on the email server with multiple folders on the client computer. POP3 also doesn't support public folder access.

使用 POP3 的电子邮件客户端使用 IMAP4 的程序更为灵活和通常可提供比其他功能。默认情况下,当 IMAP4 电子邮件程序电子邮件下载到客户端计算机,每个副本下载电子邮件服务器上的邮件保留。因为用户的电子邮件的副本保存在电子邮件服务器,用户可以访问相同的电子邮件从多台计算机。使用 IMAP4 电子邮件,用户可以访问和电子邮件服务器上创建多个电子邮件文件夹。用户然后可以访问其消息的服务器上的任何计算机在多个位置中。例如,可以配置大多数 IMAP4 程序为用户的已发送邮件的副本留在服务器上,以便他/她可以查看已发送的邮件从任何其他计算机。IMAP4 支持大多数 IMAP4 程序支持的其他功能。例如,某些 IMAP4 程序包括一种功能,允许用户查看服务器上的时仅其电子邮件的邮件头-属于邮件从和主题 — 然后下载所需阅读的邮件。Email client programs that use IMAP4 are more flexible and generally offer more features than those that use POP3. By default, when IMAP4 email programs download email messages to a client computer, a copy of each downloaded message remains on the email server. Because a copy of the user's email message is kept on the email server, the user can access the same email message from multiple computers. With IMAP4 email, the user can access and create multiple email folders on the email server. Users can then access any of their messages on the server from computers in multiple locations. For example, most IMAP4 programs can be configured to keep a copy of a user's sent items on the server so that he or she can view the sent items from any other computer. IMAP4 supports additional features that are supported by most IMAP4 programs. For example, some IMAP4 programs include a feature that lets users view only the headers of their email messages on the server—who the messages are from and the subjects—and then download only the messages that they want to read.

POP3 和 IMAP4 电子邮件程序的发送和接收选项Send and receive options for POP3 and IMAP4 email programs

通过 POP3 和 IMAP4 电子邮件程序,用户可以选择要连接到服务器以发送和接收电子邮件的时间。本部分介绍了一些最常见的连接选项,以及用户在选择可用的 POP3 和 IMAP4 电子邮件程序连接选项时应考虑的一些因素。POP3 and IMAP4 email programs let users choose when they want to connect to the server to send and receive email. This section discusses some of the most common connectivity options and provides some factors your users should consider when they choose connection options available in their POP3 and IMAP4 email programs.

常见配置设置Common configuration settings

可以在 POP3 或 IMAP4 客户端应用程序上设置的常见连接设置有以下三个:Three of the most common connection settings that can be set on the POP3 or IMAP4 client application are:

  • 每次启动电子邮件应用程序时发送和接收邮件。使用此选项时,仅在启动电子邮件应用程序时才发送和接收邮件。To send and receive messages every time the email application is started. When this option is used, mail is sent and received only on starting the email application.

  • 手动发送和接收邮件。使用此选项时,仅在用户单击客户端用户界面中的“发送和接收”选项时才发送和接收邮件。To send and receive messages manually. When this option is used, messages are sent and received only when the user clicks a send-and-receive option in the client user interface.

  • 定时发送和接收邮件。使用此选项时,客户端应用程序定时连接到服务器以发送邮件并下载所有新邮件。To send and receive messages every set number of minutes. When this option is used, the client application connects to the server every set number of minutes to send messages and download any new messages.

若要了解如何配置所使用的电子邮件应用程序的这些设置,请参阅电子邮件应用程序随附的帮助文档。For information about how to configure these settings for the email application that you use, see the Help documentation that's provided with the email application.

选择发送和接收选项时的注意事项Considerations when selecting send and receive options

某些电子邮件程序上的默认设置为在检索邮件后不在服务器上保留这些邮件的副本。如果用户想从多个电子邮件程序或设备访问邮件,则应在服务器上保留邮件的副本。The default setting on some email programs is to not keep a copy of messages on the server after they're retrieved. If the user wants to access messages from multiple email programs or devices, they should keep a copy of messages on the server.

如果运行 POP3 或 IMAP4 电子邮件应用程序的设备或计算机始终连接到 Internet,则用户可能需要将电子邮件应用程序配置为定时发送和接收邮件。通过定时连接到服务器,用户可使其电子邮件应用程序与服务器上的最新信息保持同步。然而,如果运行 POP3 或 IMAP4 电子邮件应用程序的设备或计算机不是始终连接到 Internet,则用户可能需要将电子邮件应用程序配置为手动发送和接收邮件。If the device or computer that's running the POP3 or IMAP4 email application is always connected to the Internet, the user might want to configure the email application to send and receive messages every set number of minutes. Connecting to the server at frequent intervals lets the user keep the email application up-to-date with the most current information on the server. However, if the device or computer that's running the POP3 or IMAP4 email application isn't always connected to the Internet, the user might want to configure the email application to send and receive messages manually.

备注

如果用户正在使用的 IMAP4 兼容的电子邮件应用程序支持的 IMAP4 空闲时间命令,用户可以发送到的电子邮件并从近乎实时的 Exchange 邮箱中接收电子邮件。此连接方法工作,电子邮件服务器应用程序和客户端应用程序必须支持 IMAP4 空闲时间命令。在大多数情况下,用户无需在其 IMAP4 程序才能使用此连接方法中配置任何设置。If the user is using an IMAP4-compliant email application that supports the IMAP4 IDLE command, the user might be able to send email to and receive email from the Exchange mailbox in nearly real time. For this connection method to work, both the email server application and the client application must support the IMAP4 IDLE command. In most cases, users don't have to configure any settings in their IMAP4 programs to use this connection method.