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Topic: Unsupported authentication mechanism

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.0 MARIADB edition
- Deployed with iRedMail Easy or the downloadable installer? downloadable/manual
- Linux/BSD distribution name and version:  Ubuntu 18.04.4 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx): nginx
- Manage mail accounts with iRedAdmin-Pro? no
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
from thunderbird and outlook all OK.
but
if i try to login to read my email from rouncube on any browser using the right password
roundcube always answer "Wrong Password" which is impossible and i got this error on /var/log/maillog:
mail roundcube: <1pm5u6bh> IMAP Error: Login failed for example@foobar.com against 127.0.0.1 from 110.101.103.15. Unsupported authentication mechanism. in /opt/www/roundcubemail-1.4.1/program/lib/Roundcube/rcube_imap.php on line 200 (POST /mail/?_task=login&_action=login)

All OK if i login on /iredadmin

Any help will be appreciate.

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Re: Unsupported authentication mechanism

Try to turn on debug mode in Dovecot and check:
https://docs.iredmail.org/debug.dovecot.html

It will log plain password and the error message.

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Re: Unsupported authentication mechanism

I found out dovecot service was not running. Weird, first time happen!
Thanks for your prompt answer.

ZhangHuangbin wrote:

Try to turn on debug mode in Dovecot and check:
https://docs.iredmail.org/debug.dovecot.html

It will log plain password and the error message.