Hi, this may be the right place. I browsed the code. I think there should be a test for messages per timespan per user in the following place in the code. After 'prob, clues = self._scoremsg(msg, True)', and before if prob < ham_cutoff: elif prob > spam_cutoff: in 'hammie.py'. You could 'mark to postpone' any uncertain messages which, if the same sender sends something similarly doubtful in the next few minutes, bounces both. (c.l.py reader.) Thanks and sincerely.