I run my own mail server... but then I also host my own www server too.
server runs off my 384kbit/sec cable service(dynamic IP) it's a 66mHz 486 running www(IIS), SMTP(Mdaemon), POP3(Mdaemon), IMAP(mdaemon), and webmail server(World client)
I get something like 3000 http requests per day on...