Erwin Hoffmann wrote:
Hi,
introducing a delay in qmail-smtpd EHLO greeting by about 30 secs will
reduce the amount of spam emails by typically 50%.
In case you believe it or even if don't believe it, use my 5 line patch for
qmail-smtpd.c available here:
http://www.fehcom.de/qmail/qmail.html
For the german reading community follow that URL:
http://www.heise.de/ix/news/foren/go.shtml?read=1&msg_id=11829816&forum_id=1
09974
Actually, I couldn't believe it by myself; but it works high efficient.
I believe it, we no longer have qmail on our borders, but Sendmail's
greet-pause had the same effect for us. Of course the bot-nets will
evolve, but until then it is a nice respite from the constant pounding.
DAve
regards and merry x-mas.
--eh.
Dr. Erwin Hoffmann | FEHCom | http://www.fehcom.de/
Wiener Weg 8, 50858 Cologne | T: +49 221 484 4923 | F: ...24
--
Three years now I've asked Google why they don't have a
logo change for Memorial Day. Why do they choose to do logos
for other non-international holidays, but nothing for
Veterans?
Maybe they forgot who made that choice possible.
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