As I have lots of server to maintain, apt-get should be the way to go, I don't want to spend all of my time recompiling from source except the qmail-ldap package.
It seems that auth_imap is working fine for courier-pop3d, except that auth_imap is not setting a required environment variable, AUTHADDR, that is used by the syslog to printout the authenticated username in the logs. I have patched auth_imap to set AUTHADDR, so now everything is working fine. Auth_pop on the other side seems not to work at all with courier-pop3d.
Bye
Cristiano
