2023-05-10
Useful advice for self-hosted mail
Always check your mail configuration AT LEAST 32 times.
Recently (2023-05-09), broken configuration of the bytesoft mail server was abused to send spam at an alarming rate.
Automated systems quickly tried to notify the admin, only to ironically end up in the spam folder, courtesy of (of course) Gmail.
Following the discovery of the abuse report, postfix was force-stopped and unexpected authentication issues were resolved. All deferred mail was deleted and postfix was restarted.
We love /etc/passwd!