[Psi-devel] $B40A4L5NA$NAG?M=PD%%[%9%H$N%"%k%P%$%H(B

[Michal Kochanowicz]

On Mon, Jul 11, 2005 at 08:48:32PM +0200, Yves Goergen wrote:
> My one and only proposal for a spam filter: Reject the mail at the outer
> bounds of your mail system, in realtime as it wants in. So the sender
> gets notified on problems. Of course this also notifies fake senders,

99.99% of spam and viruses has fake From / envelope addresses. NEVER
send anything to any address taken from spam/virus. You break this rule,
you become a spammer.

There is only one good way of dealing with incomming spam/viruses:
reject them at SMTP session level (so the REAL sender gets 4xx/5xx
response. If you let the spam/virus enter your system, don't ever try to
notify the sender, because you don't know his/her address - those in
spam/virus are fake).

It's going little bit off-topic...

-- 
--= Michal Kochanowicz =--==--==BOFH==--==--= michal at michal.waw.pl =--
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