[CentOS] Sendmail

Paul Heinlein heinlein at madboa.com
Fri Nov 4 21:36:07 UTC 2005

In addition to Mike's answer about editing /etc/mail/sendmail.mc, it's 
worthwhile mentioning netstat and lsof as general-purpose diagnostic 

   # to discover on what tcp ports we're listening
   netstat -tl

   # to discover to what ports sendmail is bound
   lsof -iTCP -n | grep sendmail

The output of these tools won't tell you how to fix the problem, but 
they might give you a better glimpse into the problem's nature. In 
this case, you'd have discovered that sendmail was only bound to the 
loopback interface.

Paul Heinlein <> heinlein at madboa.com <> www.madboa.com

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