Starting with lib64sasl2-plug-sasldb-2.1.22-6mdk, Mandriva by default 
creates a system group called "sasl" and installs an empty 
/var/lib/sasl2/sasl.db file with the following permissions:
mode 0640, ownership root:sasl.

If the /var/lib/sasl2/sasl.db file already exists, it is not changed
in any way.

It is recommended that administrators keep these permissions and add
application users to the "sasl" group if access to this database is needed.

For example, to permit the Postfix SMTP to authenticate users via the sasldb
auxprop plugin, add the "postfix" user to the "sasl" group and read the
"SMTP Authentication" section of the README.MDK documentation file for 
details regarding Postfix's chroot setup.

For other applications in general, just add their user to the "sasl" group.

Have fun,
Mandriva Team.