Re: Blocking spam by IP number
On Thu, 14 Aug 1997, David Sewell wrote:
: I think a Debian spam-blocking package, using TCPD and generalized to
: cover all MTAs, would be a good thing, with a couple of caveats.
That's quite difficult to implement.
One of the most important reasons: not all MTA are using
tcpserver/inetd/xinetd as their 'parent'. For example ZMailer and Sendmail
do create their own serversocket. (Yes I know, both of them have options
to make them spawned by inetd).
Another reason that you don't want to use (imho) tcpd as a spamfilter: I
like to 'filter' messages on more than just the other end's IP-address.
I know ZMailer supports additional blocking:
- source address (ip)
- HELO line
- MAIL line
- RCPT line
- existance of a valid DNS-entry in the several lines
This makes the blocking highly configurable -> that's what you want to have
(imho again :/ )
Remco
--
// Remco van de Meent
// email: remco@oloon.student.utwente.nl
// www: http://oloon.student.utwente.nl
// " Never make any mistaeks. "
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