Rejecting some recipients after DATA?

Brian J. Murrell dcc-list-in@interlinx.bc.ca
Sat Apr 20 20:19:51 UTC 2002


On Sat, Apr 20, 2002 at 11:08:06AM -0600, Vernon Schryver wrote:
> 
> There is a similar problem already in dccm.  If only some envelope
> RCPT values of a message are white listed and the checksum counts for
> message exceeds the system-wide thresholds, then DCCM silently removes
> the non-white-listed RCPTs from the message.

Ugh.  You have a recipie for disaster there.  In the case of something
legitimately bulky, the recipient does not get the message and the
sender does not get a bounce of any kind, leaving everyone wondering
where the mail is going.

> If there were a way to trigger Delivery Status Notifications through
> the Milter interface, then I think the problem could solved for dccm.

Interesting idea.  If any recipients for a message are to be
delivered, accept the message, complete with 2yz and then DSN for the
recipients that don't want it.  In the case of forged sender spam, the
postmaster will get a double-bounce, but in the case of legit
bulkiness, the sender at least knows the recipient considered it
unsolicited.

Wouldn't it be nice if Sendmail (or other MTA) had a feature, even on
the command line to take a message and create and send a DSN for it.

Anyone know any other tools for easily creating a DSN from a message?
I am sure I could cobble one together, but if it's already been
done...

b.

-- 
Brian J. Murrell
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