Ubuntu upgrade. 535 5.7.8 Error: authentication failed: authentication failure

Recently I upgraded from 10.04 LTS to 12.04 LTS, and everything worked fine, Apache2, MySQL, PHP - except from postfix mailer server. I got this error:

535 5.7.8 Error: authentication failed: authentication failure

After looking on the web I found this article: http://krisweston.com/2012/postfix-dovecot-and-mysql-on-ubuntu-12-04-lts/

I narrowed my error down to the /etc/postfix/sasl/smtpd.conf and found out that the format of this file had changed. This is the new format:

pwcheck_method: saslauthd
mech_list: plain login
log_level: 7
allow_plaintext: true
auxprop_plugin: sql
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user: mailadmin
sql_passwd: yourpass
sql_database: mail
sql_select: select password from users where email = '%u@%r'

Use this format, and I hope it will work for you!


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