I have been trying to get a mailserver working now for several weeks, as a complete newbie I would follow the instructions then suddenly it would tell me to do something I didn't understand or it didn't work the way it should. Then I was stuffed, now I'm sure most of the instructions worked, but they needed maybe more understanding than I have.
I have just followed www.qmailrocks.org
for Fedora Core3 & I have to say it does ROCK, the instructions are in plain english, not techno speak. I now have a fully functioning mailserver I would highly reccomend any newbie to go there. Before I get jumped on by the 'experts' I am not saying this is the best setup, but I feel it is the best set of instructions that get the results us newbies need.