[Mimedefang] Spam with more than one recipient - reject or not?

[Matthew.van.Eerde at hbinc.com]

David F. Skoll wrote:
> Matthew.van.Eerde at hbinc.com wrote:
> 
>> Tempfail the second of A and B at RCPT time...
> 
> There are serious practical problems with this approach:

True.  Just brainstorming.

5. Accept A and B at RCPT time... make a decision at DATA time.

If all recipients agree a message should be rejected, reject it (duh)
If all recipients agree a message should be accepted, accept it (duh)
If there's any disagreement, tempfail it ONCE and remember it.
If there's a retry later, ACCEPT IT.  The initial disagreement, plus the fact that there was a real retry, should go a long way toward proving the hammyness of the email.

Drawback... if spammers start retrying, this could be a free ride for a lot of spam.

-- 
Matthew.van.Eerde (at) hbinc.com               805.964.4554 x902
Hispanic Business Inc./HireDiversity.com       Software Engineer