I would like to reject the email of certain users or if it contains certain strings or if the title matches something for certain users.
I'm in a multi-domain environment.
it's possible? Unfortunately, this (how to configure the postfix / dovecot configuration to reject certain mail) does not fit my needs because it suggests its use
body_checks to block on certain chains. I could also use
smtpd_sender_restrictions to block emails from certain users but do not for certain users.