How to run courier-* in non-root user

[DestroyFX]

I need to run courier software in non uid0 becose I want incrase security with root_plug and when I try to fetch my mail with my client, pop3login try to start in... root so i get a:

May 8 10:06:47 mail pop3d: /usr/sbin/pop3login: Operation not permitted
May 8 10:06:55 mail pop3d: /usr/sbin/pop3login: Operation not permitted

I don't find anything on config file to change user/group and I can't use root_plug until I find how..

Anyone can help me?