Art Alexion on 1 Apr 2009 07:05:12 -0700

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Re: [PLUG] OT: spammer's DNS

On Wednesday 01 April 2009 09:17:51 Eric wrote:
> I theorize that the spammers grab a copy of the DNS records once (a
> year? a month?) and then resolve the addresses from this fixed cache.  
> The reason for this might be that when you're sending a billion or so
> spam emails a day you can speed up the sending process and lower your
> visibility and network demands by not making DNS requests for each of
> those outgoing spams.

This really seems to make sense.

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