If you installed qmail from rpm, and you also have the qmail-pop3d
initscripts installed, some basic steps to do
1) Install checkpassword.
2) Tell qmail to deliver to maildir at least on the account you want to
check via pop.
3) set up tcprules file for qmail-pop3d. Like
127.0.0.1:allow
1.2.3.4:allow
5.6.7.8:allow
:deny
where 1.2.3.4 is the server's IP, and 5.6.7.8 is the IP of the location of
the msn account. (You could set IP ranges, if needed). Do not forget to
create the cdb file!
4)
/etc/rc.d/init.d/qmail-pop3d.init
5) telnet to port 110, and do an elementary pop session to see if things are
working well.
6) Test now from the msn account. If all is well, then
chkconfig --add qmail-pop3d.init
Check out the the FAQ for qmail for more explanation.
If the above does not seem to apply to you, then tell us more about your
setup (if you installed from rpm, and which rpm, if you have initscripts or
not, if you have checkpassword, etc)
Mate