On Thu, 16 Oct 1997, Rahul Dhesi wrote:
> I have a brief antispam proposal: When sending mail via SMTP, if Exim
> sees an 'unknown user' error response, it should remember the bad
> address. Then for the next N days (or forever) incoming mail should be
> immediately rejected if it's from the same bad address.
Interesting idea, but:
(1) The spammers seem to use a different bad address for each spam, and
sometimes a different bad address for each copy of the same spam, so I'm
not sure how much this would actually gain you.
(2) By turning on receiver_verify you keep the messages out of your
system in the first place. We were loath to turn this option on here,
because we previously tried to give a "friendly and helpful" message to
bad addresses. However the level of spam has forced us to degrade our
service to real users in this way. (Which I resent!)
--
Philip Hazel University Computing Service,
ph10@??? New Museums Site, Cambridge CB2 3QG,
P.Hazel@??? England. Phone: +44 1223 334714
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