Check the Inbound SMTP connector. Be sure that your server is accepting inbound connections on port 25. Check your public MX records to be sure they are accurate and available.
Can you telnet to port 25 on your external IP address
See what your MX records are point to
Then telnet <mxrecord> 25 you should see header from Mail server .
If you are trying to POP mail telnet <mxrecord> 110 for POP
Probably could diagnose this for you in a few time please feel free to contact me firstname.lastname@example.org with any bounced email and your domain
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Last Wiki Answer Submitted: April 11, 2008 1:44 pm by Labnuke9932,630 pts.
All Answer Wiki Contributors: Labnuke9932,630 pts.