Hello,
One of our users reported a rejected email with the error code and message
Remote-MTA: dns; artemis.gat.com
Diagnostic-Code: smtp; 550 Sender IP reverse lookup rejected
We handle several domains with different outgoing smtp settings at
multiple mail gateways:
# /etc/postfix/master.cf
wignersmtp unix - - y - - smtp
-o smtp_bind_address=148.6.0.56
-o smtp_bind_address6=2001:738:5001::56
-o smtp_helo_name=smtp.wigner.mta.hu
-o syslog_name=postfix-wigner-smtp
# /etc/postfix/main.cf
default_transport = kfkismtp
sender_dependent_default_transport_maps =
hash:/etc/postfix/sender_transport
# /etc/postfix/sender_transport
@wigner.mta.hu wignersmtp:
...
The sender address was from the @wigner.mta.hu domain and the IPv4/IPv6
addresses resolve to smtp.wigner.mta.hu. The HELO name is also explicitly
set to this name. Using debug_peer_list I could verify that the wignersmtp
transport setting is used for @wigner.mta.hu senders indeed.
So, what kind of incorrect setting can the "Sender IP reverse lookup
rejected" error message be mean?
Best regards,
Jozsef
-
E-mail : kad...@blackhole.kfki.hu, kadlecsik.joz...@wigner.mta.hu
PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt
Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences
H-1525 Budapest 114, POB. 49, Hungary
