it seems we have lost an email we sent.
The mail was received by the recipient and I can see the log entries coming from amavis.
The mail can not be found in the senders account, nor anywhere else on the server.
I restored the account to the stat 5 minutes after the mail was sen-> no mail.
The user is sure not to have deleted the mail. And even if so, it must have been in the trash folder.

Now my question. Is there any way to see what happened to the mail in the logs?

How can a message get lost like that?

Thanks for your help