OT: "greylisting" - looking for opinions

Julian Field mailscanner at ecs.soton.ac.uk
Sat Jun 21 08:47:12 IST 2003

This can't really be done with MailScanner as it does not involve itself in
the SMTP service at all.
There are already plenty of programs out there which are very good at doing
this (ie. the MTAs) so I don't want to try to write my own. MailScanner is
only involved once the entire message has been collected and queued.

At 08:39 21/06/2003, you wrote:
>Sorry to crosspost for those of you who are on the SAtalk list, but I'd be
>interested to get your opinions on the concept of "greylisting" as a
>spamfighting tool (I apologize also if this has been brought up on the
>list before).  To summarize, it involves initially rejecting an SMTP
>session from an unknown source (this is oversimplifying  -- it's rather
>more that the entire SMTP session is "unfamiliar") in the expectation that
>a legitimate SMTP host will try again a short time later while a spamming
>host will not.
>Here's a link to a fuller treatment:

Julian Field
Professional Support Services at www.MailScanner.biz
MailScanner thanks transtec Computers for their support
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