North American Network Operators Group

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Re: greylisting

  • From: Ken Leland
  • Date: Fri Feb 06 15:43:30 2004

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.

The reduction in unwanted email is on the order of 40 or 50
to 1. It obviously is not without its own pain so it may
not be for you. This should discussion should probably be
taken offline or two another list though.

Ken Leland
Monmouth Internet