question

Emanuele-0211 avatar image
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Emanuele-0211 asked joyceshen-MSFT commented

Office365 mail forwarding finish into spam

Hi all,

i have a mail mail1@domail1.com on domain domain1.com with a forward rule on mail2@domain2.com on domain2.com. The 2 mail are on different azure ad tenant.

The second mail is managed by me, it is the only mail with licence to receive mail(this solution is temporary). My problem is that all sent to mail1@domail1.com and after that forwarded to mail2@domain2.com finish into spam, eg mail from customer from gmail, live yahoo etc...

On my tenant i have all setting at default, i checked message trace but i got this without information:

enter image description here

i do not understand what is the problem, if is from my side o from the mail that forward the message. There is something else that i can check?

Regards


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AndyDavid avatar image
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AndyDavid answered Emanuele-0211 edited

What is set for junk mail in Outlook/OWA? Do you have it enabled, set to low? Using blocked lists?

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Hi,

i can check on mail2@domain2.com, on owa nothing is configured:
162385-image.png


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on antispam filter i see 3 rule that are the default:

162391-image.png


As written before. Our office365 is all with default setting. what can it be? A problem on mail1@domail1.com or mail2@domain2.com ?


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AndyDavid avatar image
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AndyDavid answered Emanuele-0211 commented

Does domain1 have its SPF record and DMARC record configured correctly?

https://mxtoolbox.com/

https://mxtoolbox.com/spf.aspx

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Hi,

yes domain1 is ok with spf:

162475-image.png


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joyceshen-MSFT avatar image
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joyceshen-MSFT answered joyceshen-MSFT commented

Hi @Emanuele-0211

Could you please check the message header for these junk emails? And are you using inbox rule to forward the mails? Will the message still go to junk folder if you sent it directly to mail2 account?

Here is an official document introduces a similar issue as yours, please firstly check if this is your scenario: Email messages redirected from one mailbox to another mailbox through an Inbox rule are marked as SPAM

In Exchange Online, some email messages that are redirected from one mailbox to another mailbox through an Inbox rule are marked as SPAM. Then, these messages are either moved to the Junk folder or to a hosted quarantine.
Additionally, when you try to see a result through a message trace, you notice a status setting of FilteredAsSpam. Also, in the message header information, you may notice that Spam Filtering Verdict (SFV) indicates non-spam, but the Spam Confidence Level (SCL) is set to 9.

And the below options can be used to solve this issue:
1.Disable SPF record: hard fail under the ASF options.

2.If all the email messages are redirected through an Inbox rule, you can disable this rule and enable forwarding at the mailbox level.
Set-Mailbox -identityUserA@domain.com-ForwardingAddress &#39UserB#39; -DeliverToMailboxAndForward $false

3.Create a new SPAM filter policy that has the same settings as those in the policy in which the ASF option of SPF record: hard fail is enabled. To do this, you have to make sure that the ASF option of SPF record: hard fail is disabled in the new policy. Then, you can associate the policy to the user who is experiencing the issue.

  1. In the Exchange admin center, locate Protection > spam filter.

  2. Click the plus sign (+) icon to create a new policy, and then specify the details for the policy.

  3. Make sure that the ASF option of SPF record: hard fail is left disabled.

  4. In the Applied To section, add the recipient who is experiencing the issue.


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Hi,

in the header of the email i see SCL to 5.

I tried to sent the same mails from live and gmail account if i send it to mail1@domail1.com and after forward to mail2 . It finish to spam. If i sent directly to mail2@domail2.com it finish correctly to inbox folder

I checked on mail2@domain2.com antispam setting and all is on off:

162551-image.png


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Hi,

Thanks for providing further information, have you tried the methods above?

You could firstly enable forwarding at the mailbox level, rather than using inbox rules or mailflow rules to forward the emails.
Set-Mailbox -identity mail1@domail1.com -ForwardingAddress mail2@domail2.com -DeliverToMailboxAndForward $false

If the solution doesn't work, then try the third method.

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Hi,

Is there any update about this issue so far?


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Hi,

Any progress here, have you tried the suggestions above and verify the result in your environment?


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