nanog mailing list archives
RE: greylisting
From: "Dmitri Krioukov" <dima () krioukov net>
Date: Fri, 6 Feb 2004 22:33:21 -0500
well, it might not scale only at the global scale :) (while its current 'deployment' is far from being global as far as i can see) -- dima.
-----Original Message----- From: owner-nanog () merit edu [mailto:owner-nanog () merit edu]On Behalf Of Suresh Ramasubramanian Sent: Friday, February 06, 2004 10:19 PM To: Ken Leland Cc: nanog () merit edu Subject: Re: greylisting 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?we have 20 regex expressions that block mail directly from a reverse dns that "looks" like a consumer broadband connection. Then we have to maintain a whitelist on a case by case basis.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
Current thread:
- greylisting Dmitri Krioukov (Feb 06)
- Re: greylisting Ken Leland (Feb 06)
- Re: greylisting Suresh Ramasubramanian (Feb 06)
- RE: greylisting Dmitri Krioukov (Feb 06)
- Re: greylisting Suresh Ramasubramanian (Feb 06)
- <Possible follow-ups>
- RE: greylisting Dmitri Krioukov (Feb 06)
- Re: greylisting Ken Leland (Feb 06)