> I don't find any debugging-parameters to use, so I can't get any better > message .... Doing saslauthd -d showed me this on the working system: saslauthd[18264] :do_auth : auth success: [user=test] [service=smtp] [realm=] [mech=pam] saslauthd[18264] :do_request : response: OK While the other system's saslauthd didn't do anything. Strange...but that's clearly why it can't validate the user. /P