Mail Server


Dear all

I thought building a mail server is very easy untill I tried it.I was
able to send emails but not recieved it from out side email relaying
denied from your location is the error message that I always got
whnever I did that

Is there any body have a knowledge to show me in 1-2-3 how to build
that mail server

I'm using Fedora 8 and squirrelmail

Thanks
.