It is not a dumb question 

I had to figure it out myself first.
there is a file in /etc called hosts
Edit it with vi or joe or whatever.
You'll see this:
127.0.0.1   localhost.local localhost
Fill in the ip-adressen and the clients who are connecting to this machine
In teh end it will look like:
127.0.0.1  localhost.local  localhost
192.168.0.3  mitch.myself-inc.com  mitch
192.168.0.4  barry.myself-inc.com  barry
192.168.0.12  steven.myself-inc.com steven
That's it!
Now there should be no problem at all while connecting to the pop3 server or using ssh.
good luck!
M.