I'm migrating Mandrake 10.1 servers. I have just about eveything up except postfix. I can't get it to accept mail.

I finally got my messages bounce back. I'm not getting errors because the connection isn't even getting made. If I telnet myhost.com 25, I get "Could not open connection to host on port 25. Connection failed."

netstat -nl | grep 25 says
tcp 0 0* LISTEN

I did some research. Seems I need an external interface listening for smtp.
I tried adding
myhost.com:25 inet n - n - - smtpd
to my master.cf, but postfix wont' run. postfix status says "master not running".

From that machine I can telnet localhost 25 and get a connection. How to I allow for an external connection?