I run an MTA, but I want a authentication for relayed mails and this is not possible with smtp. Cucipop ist faster than qpopper, but does not support XTND XMIT. So cucipop should be default and qpopper for sending mails via POP3.
But I found the solution: I installed qpopper with --force-conflicts and changes the qpopper service from pop-3 to pop-2 in inetd.conf. >I'm not sure you can tell qpopper to run on a port other than 110 and even if >you did >this would probably cause you problems since most clients don't allow you to >specify a >port for your pop server. One possibility would be to use ip aliasing to add >another >IP and have qpopper bind to the other address. This would require you to >modify the >source code though. Perhaps there's an easier way around your problem. Why >can't you >run smail/sendmail/exim/qmail?