[Mimedefang] Reject Spam instead of tag it

[James Ebright]

On Wed, 13 Jul 2005 15:54:35 -0700 (PDT), Curtis wrote
> We tag as spam for
> anything between a 5 and 20.

We do a similar check/tag, but reject at the SMTP level (using action_bounce)
if it scores higher than our reject threshhold, this notifies the sending MTA
that the message was NOT delivered as it was never accepted for delivery.
Discarding the message means the sender in the case of a false-positive never
knows their message was not delivered and has no way of knowing what happened
to their mail as the sending MTA got a "250 message accepted for delivery"
from your MTA. Mail should NEVER just disappear if it is accepted, the only
exception I have ever made is for virus mail and DOS type attacks and I don't
think anyone would ever give an admin grief in either of those two cases.

> Finally, I would like to review the RFC you were
> trying to cite. The one you gave is not for SMTP or
> Sendmail. The RFC you cited is for an SNMP standard.
> Which RFC should I review?

I may have typoed that number, here is the URL:
http://www.ietf.org/rfc/rfc2821.txt

I believe you will want to look at section "6.1 Reliable Delivery and Replies
by Email" specifically but it is also mentioned in a few other places.


Jim
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