Debian 6 Plesk 10.4 mail problems

[CyberxXx]

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE
Parallels Plesk, 10.4.4 Update #27, last updated at April 22, 2012 12:16 AM, Debian squeeze 2.6.32-5-amd64, X64

PROBLEM DESCRIPTION AND STEPS TO REPRODUCE
can not login to mail server thought imap,pop or smtp

ACTUAL RESULT
can not login to mail server thought imap,pop or smtp

EXPECTED RESULT
After Upgrade Debian 5 to Debian 6 and plesk from 9.5 to 10.4 mailserver seem to work but it does not accept the password that is set thought the plesk panel. I am using postfix for mailserver.

I also when try to login from webmail it also does not accept my password.

Also i switch to qmail and is the same issue, nothing change.

I believe it has to do with courier-imap. The maillog does not report anything sirius so i can investigate the problem.

Any ideas from the developer team or someone facing the same issue?

 

[IgorG]

Any error messages, logs and other details?

 

[CyberxXx]

Any error messages, logs and other details?

in maillog nothing. Just show the connection ip and then disconnect. and for imapd when connecting with webmail the same.

i can not understand where is the error.