[ILUG] Re: [GLUG-tech] exim and grey listing
belgarath at webangel.ie
Thu Aug 2 20:48:12 IST 2007
On Thursday 02 August 2007 19:58:07 Cian Davis wrote:
> Colm Buckley wrote:
> > On 02/08/07, Daniel Shaw <dshaw78 at gmail.com> wrote:
> >>> How well does grey listing work ?
> >> Very very very well.
> > If you can live with the false positive rate. Which is nonzero
> I do agree that it works very, very well but there is a gotcha.
> Depending on the sending MTA, the delay can be minutes or hours. I
> would imagine that business people would be unwilling to wait that
> long. It does become a PITA every now and again. However, it's cut my
> spam from >150/day to about 5-6 a day.
Well it depends on the implementation my graylist blocks only first attempt
form the e-amil adres/ip hash so if sombody sends a message again it goes
through the db is kept for one month so only the first message is delayed :)
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