i am relaying emails from my server to thru my ISP, which has been working except just recently routine text emails have been bouncing
the service log bounce error
Jan 6 11:31:01 culser postfix/smtp: E10DE19C627: to=<@gmail.com>, relay=smtp.rcn.com[ unknownip ]:25, delay=0.57, delays=0.02/0.01/0.37/0.17
, dsn=5.7.1, status=bounced (host smtp.rcn.com[184.108.40.206]
said: 554 5.7.1 [P4] Message blocked due to spam content in the message. (in reply to end of DATA command))
I am running Debian Linux, and using Postfix email transport.
i have the main.cf file attached
I had a simular issue a few months back posted on this site.