Re: [Asrg] filtering at connect time

["David F. Skoll" <dfs@roaringpenguin.com>]

On Mon, 3 Mar 2003, Michael Marking wrote:

> One problem with text filters of various kinds is that the spammer is
> unaware that the spam won't be delivered.

Not necessarily.  Text filtering and how you handle rejection are
orthogonal; you can use (for example) Sendmail's Milter API to
fail MAIL FROM:, RCPT TO: or DATA commands.

> At least one hashcash system (http://ssl.dizum.com/hashcash/) adds a new
> header to the e-mail:
> 	X-Hashcash: <token>
> This has a similar problem to that of text filtering: the spammer isn't
> aware that the mail is unwelcome.

Not necessarily; you can fail the DATA command.

I would really like to see other MTA software (qmail, Postfix, Exim)
implement "real-time" filtering during the SMTP conversation.  As far
as I know, Sendmail is the only MTA that does this currently.

--
David.
_______________________________________________
Asrg mailing list
Asrg@ietf.org
https://www1.ietf.org/mailman/listinfo/asrg