[Greylist-users] Greylist gravy train ends in 3-6 months
tor at slett.net
Sat Jul 17 15:15:26 PDT 2004
On Jul 16, 2004, at 07:52, Regis Wilson wrote:
> 1. Zombie machine downloads 10,000 email addresses and starts
> delivering mail
> 2. Zombie detects tempfail code and puts from, to, and timestamp in
> 3. Zombie is done mailing 10,000 emails, goes to redliver queue. If
> is 1 hour, 1 minute old, redeliver using same from, to and IP.
> It took me 3 seconds to come up with this idea and algorithm. Any
> could write it and test it within one hour. The next virus or trojan
> upgrades all the zombies and infects more new zombies. Greylisting is
> long live greylisting!
This idea has been mentioned in various lists at times (e.g.
'exim-users at exim.org'). What is needed, now that it is out in the
open, is a defensive patent. (Heck, maybe greylisting itself should be
Problem is, a US patent application takes anywhere from $10,000 to
$20,000 to file. A world-wide patent (WIPO) about ten times that.
This, according to a IP training class I just took at work, so there
may be some attorney cost included here.
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