Re: [exim] rogue connections to broadcast addresses

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Autor: Andrzej Adam Filip
Data:  
A: exim-users
CC: Leonardo Boselli
Assumpte: Re: [exim] rogue connections to broadcast addresses
Leonardo Boselli wrote:
> I got a lot of activity sending e-mail (bounce errors) to
> allmarts.com matmail.com and arthlink.net .
> These two domains have an MX pointing to 192.168.255.255
> that is not very legal, also becouse it is the broadcast address of a
> reserved subnet ...
> being such address packets leave the server, but connection never
> come back. This locks the server with a lot of open conenctions, with
> the results that often squid ends working having no free ports.
> Is there a way to avoid this problem, other than asking the dns
> maintainer for these domains to correct
> [ideally: how to let exim ignore and drop domain pointing to a reserved
> address , without even tryyng to pass forward ??


You may consider rejcting messages with envelope sender domain listed by
bogusmx.rfc-ignorant.org.

AFAIK exim can reject such addresses without rfc-ignorant help but it will
redirect would be complaints somewhere else and save you from sending
explanations.

URL(s)
http://rfc-ignorant.org/policy-bogusmx.php

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Andrzej [en:Andrew] Adam Filip anfi@??? anfi@???
Home Page http://anfi.homeunix.net/ [ PageRank 6 ]