help: error in server configuration

[Defiant]

Hi, i have installed qmail with ldap patch: the smtp works fine, but i have some problem with pop3. When i try to connect with a telnet session on port 110, i have this error message: user pippo +OK pass pippo -ERR error in server configuration Connection closed by foreign host. This message shows only for ldap users, unix users are ok. Qmail-ldaplookup works fine. Any ideas? Defiant