pwcheck_method: auxprop
auxprop_plugin: sql
allowanonymouslogin: no
allowplaintext: yes
mech_list: plain login cram-md5 digest-md5
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user: froxlor
sql_passwd: MYSQL_PASSWORD
sql_database: froxlor
sql_select: SELECT password FROM mail_users WHERE username='%u@%r' OR email='%u@%r'