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I am not sure if this is the problem. But try the following.
look for a line like
O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA
Comment that line (Add a # in the beginning). Restart sendmail.
Try a telnet <your-ip> 25. If you get connected, the above change has worked.
Still no luck (had a major power outage while tyring to troubleshoot)
I tried the following:
1) I did a local telnet myhost.com 25
this worked and I was able to send an email
2) from another pc connected my NG router (using putty)
i did a telnet to ip.mymailserver.com port 25
I was able to send a text mail to a user on the system that arrived ok
3) I went to an outside webmail and tried to send an email to the mailserver
it never arrived and nothing showed up in the maillog
this is has me stumped, are there any other suggestions?
Let me point out what I have done:
1) went thru and redid the configuration for my caching dns
2) re-visited my /etc/host file and gave a few tweeks
3) made sure I had my ISP nameservers in /etc/resolv.conf
4) checked my domain, MX, and IP with dig
I found one of the root servers has bad/corrupted info
5) did a telnet IP 25 and sent an email from a pc on the
its connected to the NG router but not directly to linux bx
6) sent emails (from the web) from another mailbox to users on
the linux box - got bounced with 4.4.1
7) went to http://www.mxtoolbox.com/diagnostic.aspx and did a
smtp check - it worked.
I did find from the maillog that relaying is denied. Perhaps this is the problem.