Postfix setup

[Jim Kronebusch]

> > >4. You can't telnet to port 25 from remote windows machine.
> > >  - can you ping the server from the windows machine, by name and ip?
> > pinging by name works and so does pinging by ip
> 
> So DNS is okay and there's basic routing between the desktop and the mail
> server.  A firewall seems the most likely problem now.  That could be on
> either the server or the windows machine.

When you ping by name, is an internal IP or external IP resolved?  If an external is
resolved then communication is going outside then trying to come back in.  This could
allow your external firewall to block your internal requests on port 25.

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