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Ken Leland [2/7/2004 2:11 AM] :
On Fri, Feb 06, 2004 at 01:40:14PM -0500, Dmitri Krioukov wrote:can someone provide any comments on greylisting? how effective is it, etc?
Er, I think you and Dmitri are talking about different things.
From a mail operations standpoint, I am not a big fan of graylisting, because even legitimate senders get 4xx'd for a while, the first time they send mail.
When any such strategy means that someone else's mail queues are filled with timed out emails waiting for retransmission, it d not be rocket science to see why this just doesn't scale too well.
srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9
manager, outblaze.com security and antispam operations