Kolab 2.2.2 and Horde: Unable to login for "SECURITY PROBLEM"

[Alessio Cecchi]

Hi,

ona fresh installation based on Kolab 2.2.2 I'm unable to login in
Horde. The error in /kolab/var/kolab/www/client/log/php-errors.log is this:

[03-Dec-2009 14:33:53] PHP Notice:  Unknown: SECURITY PROBLEM: insecure
server advertised AUTH=PLAIN (errflg=1) in Unknown on line 0
[03-Dec-2009 14:33:53] PHP Notice:  Unknown: IMAP protocol error: Client
canceled authentication (errflg=2) in Unknown on line 0
[03-Dec-2009 14:33:53] PHP Notice:  Unknown: IMAP Authentication
cancelled (errflg=2) in Unknown on line 0

I have read for similar problem and also find an issue
(https://issues.kolab.org/issue2983) but I haven't find the resolutionf
for the problem.

How can i solve?

Thanks
-- 
Alessio Cecchi is:
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