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List:       postfix-users
Subject:    Re: Preferred/maintained greylisting options?
From:       Doug Hardie <bc979 () lafn ! org>
Date:       2020-05-27 1:09:17
Message-ID: ED6AC72A-050E-48E7-BE94-1A9F5C157E83 () mail ! sermon-archive ! info
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> On 25 May 2020, at 12:00, Chris Wedgwood <cw@f00f.org> wrote:
> 
> > Greylisting has become pretty much useless.  When I disabled it a
> > couple years ago, the spam levers did not increase by any measurable
> > amount.  We now use just 3 RBLs and that seems to be a relatively
> > acceptable level of spam.
> 
> Checking for %ge of messages that "return after defer" I see:
> 
> WeekOf      PctReturned
> ----------  -----------
> 2020-04-30  22.1
> 2020-05-07  26.5
> 2020-05-14  21.2
> 2020-05-21  26.5

I would guess that our users were hit by spammers with more resources ;-)  I would \
have kept greylisting if we had seen numbers like that.

-- Doug


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