Reject forged/spoofed email addresses
Many people have been asking how to block forged MAIL FROM:<> email addresses.
Correct me if I wrong but it seems to me that Postfix:reject_unauthenticated_sender_login_mismatch could resolve this issue for all local addresses. If so I could see integrating this into ISPC3.
You can read up on it here.
It is my understanding that if used with smtpd_recipient_restrictions it will require you to be authenticated for any addresses located in $smtpd_sender_login_maps & that can be easily specified.
Here is another post with a similar dilemma.
Added as a feature request to our bugtracker.
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