sm_mbdb_lookup
extern int sm_mbdb_lookup __P((char *, SM_MBDB_T *));
sm_mbdb_lookup(e->e_from.q_user, &user) == EX_OK)
status = sm_mbdb_lookup(name, user);
if (tryagain && (status = sm_mbdb_lookup(name, user)) != EX_NOUSER)
if (sm_mbdb_lookup(c->q_user, &user) == EX_OK)
else if (sm_mbdb_lookup(e->e_from.q_user, &user)