Fake MX records

[Mogens Melander]

On Mon, July 23, 2007 20:12, Hugo van der Kooij wrote:
> On Mon, 23 Jul 2007, Martin.Hepworth wrote:
>
>> http://wiki.apache.org/spamassassin/OtherTricks (Fake MX Record)
>>
>> on the SA-users list.
>>
>> Looks very useful, anyone here using this technique?
>
> I use it partially. MX 10 is me. MX 100 is for backups. MX 1000 is me
> again as spammers favored the highest MX (lowest priority) to bypass
> (RBL) filters. Now they seem to take them at random and ignore the
> priorities.
>

I was thinking about a "thingy" that would query senders MX if
sender was valid (accept mail to sender) but i don't like to
waste too much bandwidth on a allready crowded internet, so i'm
still thinking. This "Fake MX" would of cause break this idea,
unless i'd make it retry until all MX's been "tasted", adding
more trafic to the pool. But this could be done at MTA level,
and thus, not be too expencive.

As i'm not a perl/C hacker, i'll limit my tests to PHP, but
if/when implemented, i'd be happy to share my results.

-- 
Later

Mogens Melander
+45 40 85 71 38
+66 870 133 224



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