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RE: [Asrg] New proposal for spam blocking: Greylisting

2003-06-24 07:01:56
On Tue, 24 Jun 2003, Clayton, Nik [IT] wrote:

You seem to have reinvented something that CanIt, from Roaring Penguin,
has done for a while.

I've corresponded with Evan about this.  His "greylisting" idea is a
bit more sophisticated/aggressive than what we call "hit-and-run"
prevention in CanIt.  He has taken the idea one step further.

In CanIt, we only care about sender/recipient pairs, and we don't
impose any time limits on retries.  Evan's scheme looks at
sender/recipient/IP-Address triples, and imposes lower and upper
limits on retries.

It is likely to be more effective than "hit-and-run", but also may
delay legitimate mail more and may cause problems in some (very
unusual) situations.

Regards,

David.


More information about CanIt at

    http://www.canit.ca/

I've copied David Skoll, the author, for comment.

N
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