I customise authentification in postfix through sasl + postgres


pwcheck_method: auxprop
auxprop_plugin: sql
sql_engine: pgsql
mech_list: PLAIN LOGIN
sql_hostnames: localhost
sql_user: ******
sql_passwd: ******
sql_database: ******
sql_verbose: yes
sql_select: SELECT passwd FROM t_users WHERE userid = ' %u ';

In log writes:

postfix/smtpd [10884]: unable to dlopen/usr/lib64/sasl2/libsql.so:/usr/lib64/sasl2/libsql.so: undefined symbol: mysql_field_count

The package cyrus-sasl-sqlauxprop is installed.

Prompt in what a problem?