Setting up a pop/imap mail server
Download imap from ftp.cac.washington.edu/imap or a mirror site
Follow directions in the README file for compiling (it's easy)
Edit /etc/inetd.conf and add the following lines:
pop3 stream tcp nowait root /opt/imap-4.7c/ipopd/ipop3d ipop3d
imap stream tcp nowait root /opt/imap-4.7c/imapd/imapd imapd
Check that /etc/services has:
pop3 110/tcp #Post Office
imap 143/tcp
Reread /etc/inetd.conf with:
/usr/sbin/inetd -c