Issue Mail delivery was aborted

[stefan321]

Server operating system version

Ubuntu 22.04.2 LTS

Plesk version and microupdate number

Plesk Obsidian Version 18.0.51

I have setup a mailserver for my client and it has been working perfectly for over 2 months, but yesterday he told me got the following error message, it just happens with this one email, every other email is still working. I checked the maillog but i have no idea what to search for...

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This is an automatically generated Delivery Status Notification.

Delivery to the following recipients was aborted after 19.3 hour(s):

* clientcustomer@domain.at

Reason: There was an error while attempting to deliver your message with [Subject: *************************] to clientcustomer@domain.at. It has been in queue too long, and will not attempt delivery again.

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The client has no DMARC Record, could this be essential?

Used mxtoolbox to check if mailserver from client aswell as clientcustomer was working. Everything green there.

There are some files included but they show personal information of the client, I would prefer to not show these.

What else should i check?

 

[Peter Debik]

You could submit a new mail to the recipient and then look into /var/log/maillog what the system says why it cannot deliver it.