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FortiMail VM Email Loop when sending
Dear all,
I have a problem with a FortiMail VM. I use my Fortimail as a gateway. Unfortunately, I have a loop when sending emails, which I cannot solve.
The following error scenario:
When I send an email from my M365 mailbox to another M365 mailbox this email goes into a loop and rejected with this error: "Remote server returned '554 5.4.6 < #5.4.6 SMTP; 554 5.4.6 Too many hops>'". When sending from my M365 to email addresses outside the Microsoft Cloud, the sending is successful.
Can you help me to solve this problem? I suspect the problem is because the 365 accounts are all accessible via the same IPv4 address?
Thank you very much for your help.
David
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I think you are hitting this issue - https://learn.microsoft.com/en-us/exchange/troubleshoot/mailflow/hop-count-exceeded-possible-mail-lo...
Can you apply the fix on the mail servers and check.
Suraj
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Hello David,
Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.
Thanks,
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Hello David,
We are still looking for someone to help you.
We will come back to you ASAP.
Regards,
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I think you are hitting this issue - https://learn.microsoft.com/en-us/exchange/troubleshoot/mailflow/hop-count-exceeded-possible-mail-lo...
Can you apply the fix on the mail servers and check.
Suraj
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Hello, I was able to detect a misconfiguration of a rule. The problem has been solved.
Thank you for your help.
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Hello i'm facing the same problem with O365, there is a mail loop between our tenant and the recipient tenant.
The design is like this :
EXO ---> Fortimail ---> Web
when i send an email to a recipient in another tenant 365 it's seems to do this :
EXO ----> Foritmail ----> EXO ----> fortimail ----> and again and again
Notice that we don't have problem with all the others domains. Do you have any solution to fix this problem ? the solution mark as solved in this thread can be applied in our context.
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