I have Postfix on my Ubuntu 12.04. Authentication is provided by Cyrus SASL. I try to authenticate users via Mysql database.

I allways get this error in /var/log/mail.log:
SASL PLAIN authentication failed: no mechanism available

This is my smtpd.conf configuration:
pwcheck_method: auxprop
auxprop_plugin: sqlmech_list: PLAIN CRAM-MD5 DIGEST-MD5
sql_engine: mysql
sql_user: root
sql_passwd: fT8Eqfdsf5
sql_database: postfix
sql_select: SELECT password FROM users WHERE user = "abc"

Thank you for help!**