Hello, here I have a strange behaviour from postfix. I had many mails "rejected" with a 450 code for "Sender address rejected: Domain not found", and wanted to change them to a 550 code to avoid queue on the previous mta.
So I added the row: unknown_address_reject_code = 550 on main.cf and restarted postfix. Now it seems he does it randomly, and this happens on 3 similar servers. Some logs as sample: Jan 16 17:13:24 mta1 postfix/smtpd[19697]: NOQUEUE: reject: RCPT from xxx: 450 <xaetapiwij3419...@datasolutions.pe>: Sender address rejected: Domain not found; from=<xaetapiwij3419...@datasolutions.pe> to=<xaetapiwij3419@xxx> proto=ESMTP helo=<xxx> Jan 16 17:13:36 mta1 postfix/smtpd[19689]: NOQUEUE: reject: RCPT from xxx: 550 <mivaololy1175g@danielmorales.intercast.local>: Sender address rejected: Domain not found; from=<mivaololy1175g@danielmorales.intercast.local> to=<mivaololy1175@xxx> proto=ESMTP helo=<xxx> Jan 16 17:13:36 mta1 postfix/smtpd[19676]: NOQUEUE: reject: RCPT from xxx: 450 <yjyawe414...@portalvideo.ro>: Sender address rejected: Domain not found; from=<yjyawe414...@portalvideo.ro> to=<yjyawe4144@xxx> proto=ESMTP helo=<xxx> Anyone knows why this happens? How can I force to have always 550 for inexistent domain on sender address? This happens on both postfix 2.9.6-2 or 2.2.8-1.2 Thanks, Andrea
