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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: greylisting
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: [email protected] [mailto:[email protected]]On Behalf Of > Suresh Ramasubramanian > Sent: Friday, February 06, 2004 10:19 PM > To: Ken Leland > Cc: [email protected] > 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
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