Rafael Azevedo skrev den 2020-11-06 13:48:
Checking server logs, user is not authenticating and the only way this spammer can play a trick is by sending an email to its own address (ie: from [email protected] to [email protected]).Is there a way to avoid this practice ?
thats what SPF is designed forwithout SPF, do not accept local domains as envelope sender on port 25, when this is solved it stops
more help show logs and postconf -nf
