[Mimedefang] Catching the porn spams
Kevin A. McGrail
kmcgrail at pccc.com
Thu Sep 9 13:05:36 EDT 2004
There are certainly ways to code around this and it *might* be a very valid
way to stop spammers. I'll leave that debate to continue.
However, my point was just to make sure that some admins didn't go code up a
whois lookup that was automated and find themselves in violation of the
whois rules against automation. Most of the whois servers will notice
automated lookups of X number in Y period of time and just eventually block
your access. Then you'll get every domain as unknown and start blocking all
mail ;-)
Regards,
KAM
> Well, you could do an enhanced form of greylisting. If mail comes
> from an unknown domain, you greylist for 24 hours. Otherwise, you use
> the normal greylisting timing. After 24 hours, the SURBLs should have
> caught up. This doesn't involve WHOIS lookups and is independent of
> when the domains were registered.
>
> The obvious downside is a very long (probably unacceptably long) initial
> delay for mail from a new domain. :-(
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