orsomannaro asked:
To avoid backscatter emails, on Postfix I set:
smtpd_reject_unlisted_sender = true
But this prevents the Odoo from sending some particular emails, since it uses some custom aliases as sender:
SMTPRecipientsRefused: {'[email protected]': (550, b'5.1.0 <[email protected]@mydomain.com>: Sender address rejected: @mydomain.com')}
How can I whitelist the Odoo server/app?
My answer:
Instead of making this a global directive, place reject_unlisted_sender in smtpd_sender_restrictions (it must appear after permit_mynetworks and permit_sasl_authenticated, if you used that).
Now you can add the sender’s IP address to mynetworks = to whitelist it and cause it to bypass this check.
An example from my live mail server:
smtpd_sender_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_unlisted_sender,
reject_unauthenticated_sender_login_mismatch,
permit
View the full question and any other answers on Server Fault.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.