Jan, I've IMP running now as a module with HORDE - the tests at http://mail.enseignemoi.com/horde/test.php are ok - Now the log is: FAILED LOGIN 1.2.3.4 to localhost:143[imap/notls] as user%toto.com [on line 282 of ".....horde/imp/lib/IMP.php"] user is ok when itest on IMP, so I wonder ? Have you an idea ? Pierre