Some normal outgoing messages marked as SPAM - probably caused by postsrsd
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In some very weird situations, a normal local mailbox sending a normal email can be marked as spam, probably because of postsrsd (T1099: Install postsrsd on to fix the SPF mailforward shit) as default rewrite all emails and DKIM has issues with that.

Reported by

I documented myself in:

And I've opted for this solution:

sender_canonical_maps = mysql:/etc/postfix/mysql/, tcp:localhost:10001
sender_canonical_classes = envelope_sender
recipient_canonical_maps = tcp:localhost:10002
recipient_canonical_classes= envelope_recipient,header_recipient


systemctl reload postfix

And now it seems that outgoing emails are not marked as SPAM. Tested with a real-life email to the original reporter.