Hello people ...
I put my server in production is two weeks, and some strange things are happening there ... DNS - Reverse DNS is OK, do not understand why these messages are not going ...
My domain not listed in blacklist
I appreciate the help
148A4700676 397497 Thu Mar 26 15:13:43 email@example.com (host mx.oi.com.br[126.96.36.199] said: 450 Server configuration problem (in reply to RCPT TO command)) firstname.lastname@example.org
82379700640 6590089 Tue Mar 24 17:36:20 email@example.com
(host relay2.netnames.net[188.8.131.52] said: 451 lowest numbered MX record points to local host (in reply to RCPT TO command))