Procedure to Delete Users from sasldb or Change the Password of sasldb users.
To list the users form saslsb
#sasldblistusers2
or
#sasldblistusers2 | grep username
To Delete or disable User form SASLDB
#saslpasswd2 -d username
To Chance Password
#saslpasswd2 username
To Test SASLAUTHD
#testsaslauthd -u username -p password -s smtp
#testsaslauthd -u username -p password -s pop
#testsaslauthd -u username -p password -s imap