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Re: How to block a MX without revers DNS is working ?

From: Alexander Grüner (agruenergmx.de)
Date: Tue Jul 04 2006 - 01:58:56 CDT


> You might catch those with greylisting (policyd, postgrey) or with
> weighted policying (policyd-weight, which has checks for such hosts).
>
> In both cases you would be more polite because sending mail via a home
> box (and thus dialins) directly to you is perfectly ok.

Hallo Robert :-)

I am doing that already. Unfortunately spammers are catching up with
greylisting (according to my logs). It works in about 80% (just raw
estimation from my logs).

So now I am using long (manual) dialin block lists. They work perfect
here. Almost no false positives since a few months (two cases in about
400000 mails). Last week I blocked more than 17000 connections with this
method.

German greetings: Gruss aus dem Münchner Osten an Ford ;-)

Alexander