My email server don't work because authentification failed.
After many hours of work, i found the problem.
OX6HE default password crypt his "SHA" instead of "CRYPT" in the other version (OXEE).
So PAM_MYSQL don't support SHA in the release 0.7RC.
Before initialize OX database you must change crypt system in the config this.
# possible values: CRYPT / SHA