mail server, how?

Hi! I'm using linux for a while... I configured an FTP Server and a Web Server on my computer. At this time, all seem to work well. My internet connection is DSL and my IP change when I reboot but I don't reboot often and I have a Dynamic name so my ip is updated when I reboot. Now, I want to learn how mail server works and I would like to configure one on my computer. Is it possible? I don't have a domain name but is it possible to use my dynamic name or ip address with the mail server? If yes, which server to use for SMTP and for POP, IMAP?? Generally, what's the procedure to make it working well? Which software I need? Does Bind must be running? Thanks for your help