Stähelin a écrit :
> Dear List Users
>
> Is it possible (and how) to block emails sent via an outside smtp server
> (not mynetworks) with our domain?
>
> Background:
> We had phishing attacks from outside (not our ip-range) with the
> from-address someth...@ourdomain.ch
> which was sent to our users.
>
smtpd_recipient_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
...
check_sender_access hash:/etc/postfix/access_sender
...
== access_sender
ourdomain.example REJECT blah blah
.ourdomain.example REJECT blah blah
