Re: [Exim] pri/sec MX on same machine to catch spam

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Szerző: Philip Hazel
Dátum:  
Címzett: Wakko Warner
CC: exim-users
Tárgy: Re: [Exim] pri/sec MX on same machine to catch spam
On Thu, 17 Jul 2003, Wakko Warner wrote:

> Some spammers will hit the primary once and never try again. Since the host
> hasn't been seen before, the message won't come through. Some spammers will
> only hit the secondary server. If they do, the secondary will check the DB
> and if it hasn't seen this host, assume it's a spam and blacklist.


... and when your primary interface hardware breaks?

... and when your secondary inferface hardware breaks?

... and when there's a screwup in somebody's router so that only the
secondary IP address is reachable?

OK, relatively unlikely, especially if there's only one interface with 2
IP addresses. But I would be scared of this kind of thing.

--
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book:    http://www.uit.co.uk/exim-book