Thanks, I think the problem is, that the Mozilla Mail Client didn't send the username/passwd in plain test! I posted an ethereal trace in this thread!
Your IMAP server offers CRAM-MD5 and so Mozilla (finally!) does what it should: it uses it.
I guess you're using saslauthd and not sasldb, right? You need to change your /etc/imapd.conf file so that it doesn't offer CRAM-MD5:
sasl_mech_list: PLAIN LOGIN
Greetings, Sebastian -- Sebastian Hagedorn M.A. - RZKR-R1 (Flachbau), Zi. 18, Robert-Koch-Str. 10 Zentrum für angewandte Informatik - Universitätsweiter Service RRZK Universität zu Köln / Cologne University - Tel. +49-221-478-5587
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