SASL LOGIN authentication failed: authentication failure

# testsaslauthd -u mymail@mydomain.com -p 123456 -f /var/spool/postfix/var/run/saslauthd/mux
0: NO "authentication failed"

Oct 02 13:48:10 mydomain.com saslauthd[17624]: pam_unix(imap:auth): check pass; user unknown
Oct 02 13:48:10 mydomain.com saslauthd[17624]: pam_unix(imap:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Oct 02 13:48:12 mydomain.com saslauthd[17624]: DEBUG: auth_pam: pam_authenticate failed: Authentication failure
Oct 02 13:48:12 mydomain.com saslauthd[17624]: do_auth         : auth failure: [user=mymail@mydomain.com] [service=imap] [realm=] [mech=pam] [reason=PAM auth error]
Oct 02 13:48:19 mydomain.com saslauthd[17628]: PAM unable to dlopen(pam_mysql.so): /lib/security/pam_mysql.so: undefined symbol: make_scrambled_password
Oct 02 13:48:19 mydomain.com saslauthd[17628]: PAM adding faulty module: pam_mysql.so
Oct 02 13:48:19 mydomain.com saslauthd[17628]: DEBUG: auth_pam: pam_authenticate failed: Module is unknown
Oct 02 13:48:19 mydomain.com saslauthd[17628]: do_auth         : auth failure: [user=mymail@mydomain.com] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]