Jul 19 19:25:35 myserver postfix/error[14000]: D075AA21004: to=< z...@comcast.net>, relay=none, delay=0.36, delays=0.36/0/0/0, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mx2.comcast.net[76.96.30.116] refused to talk to me: 554imta33.emeryville.ca.mail.comcast.net comcast 204.130.140.253 Comcast block for spam. Please see http://help.comcast.net/content/faq/BL000000 )
What determines the mapping between the upstream mail servers 554 and being registered as dsn=4.0.0 and being treated as a temporary failure. How can we force this to be a permanent failure and stop retrying and bounce these types of email. # postconf -d soft_bounce mail_version soft_bounce = no mail_version = 2.7.1 # # postconf -n soft_bounce soft_bounce = no # # postconf -n | grep code #
