On Tue, 08 Feb 2011 15:47:12 +0000
Steve Freegard <st...@stevefreegard.com> wrote:

> See http://www.fsl.com/index.php/resources/whitepapers/99

"Once that has been proven then that 'hostid' is exempted from further
greylisting for 40 days since it was last seen."

:)  Our CanIt system has been doing this since at least 2005.

Also, I wrote about greylisting a few months before Evan Harris
published his paper:

http://groups.google.com/group/comp.mail.sendmail/msg/ef7624049e1193a2?hl=en

Regards,

David.

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