Mail blocking (was: I've had enough. I'm starting a DNS blackhole
Greg 'groggy' Lehey
grog at FreeBSD.org
Wed Sep 24 21:05:40 PDT 2003
On Wednesday, 24 September 2003 at 17:15:27 -0500, Kirk Strauser wrote:
> Yep, I really am. From now on, any system that relays a virus-laden email
> to my system is going into a DNS blackhole list serving all of the systems I
> administer. In a fit of "had it up to here"-ness, I've written the
> following programs today:
On Wednesday, 24 September 2003 at 21:17:26 -0400, Drew Derbyshire wrote:
>> [missing context]
> Seems like a lot of work with way too much room for false positives.
> Why aren't you running a content filter on executable attachments so they
> get bounced and you never see them?
One reason would be that the traffic is expensive. I'm on a 2
GB/month plan, after which I pay significantly higher charges. I'm
currently getting 50 to 60 MB a day just of this mail crap. Yes, it
all gets dropped (just dropping .exe attachments does it), but that
doesn't stop the traffic.
See complete headers for address and phone numbers
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