Jan Schneider <jan <at> horde.org> writes: > > Your IMAP server is having issues. Check its log files. Thanks a million Jan, it seems the authpsa module (provided by Plesk) problem, reported to Plesk - http://forum.parallels.com/showthread.php?289054-Plesk-11-5-30-bug-courier-imap-module-quot-authpsa-quot