Le mar 18 juillet 2006 10:03, Pierre Habouzit a écrit : > Le mar 18 juillet 2006 10:00, Lionel Elie Mamane a écrit : > > On Mon, Jul 17, 2006 at 11:48:21PM +0200, Pierre Habouzit wrote: > > > Le lun 17 juillet 2006 22:29, Lionel Elie Mamane a écrit : > > > > > > > > > the discussion (...) was about enabling greylisting on *certain* > > > *specificaly* *suspicious* hosts. a suspicious > > > host is: > > > * either listed on some RBL's (rbl listing "dynamic" blocks are > > > a good start usually) > > > * either having no reverse DNS set > > > * either having curious EHLO lines (that one may catch too much > > > good mail sadly, so it's to handle with care). > > > * ... > > > > > > I apply greylisting on the two first criteriums on a quite used > > > mail server (around 300.k mails per week, which is not very big, > > > but should be representative enough). > > > > > > there is less than 50 mails a week over those that *may* be > > > legitimate mails that are actually slowed down. > > > > On second thought, I'm very interested in how you measured this > > false positive rate. Do all the recipients of the 300k mails per > > week check for every mail if it was greylisted (that means you > > would put a header or something like that saying "this mail was > > greylisted"?), and they _always_ check on _every_ legitimate mail > > and _always_ report false positives to you? Probably not. So, are > > these 50 mails a week all the mail that undergoes greylisting but > > *still* goes through (i.e. gets retried, roughly)? Something else? > > it's the number of mails that are beeing resubmited per week with my > system. so in fact, in them, there is 49 spams. oh and as a matter of a fact, I just happen to see that you Cc-ed me on the exchanges, I just received the first mail you sent. Just see by yourself how fast and furious master runs: Received: from master.debian.org (master.debian.org [70.103.162.30]) by mx1.polytechnique.org (Postfix) with ESMTP id 7512D33176 for <pierre.habouzit@m4x.org>; Tue, 18 Jul 2006 10:05:31 +0200 (CEST) Received: from 5.xs4all.nl ([213.84.114.29] helo=capsaicin.mamane.lu) by master.debian.org with esmtp (Exim 4.50) id 1G2k5n-0007ft-48; Tue, 18 Jul 2006 02:34:07 -0500 Yeah, master took 31 minutes to deliver the mail to the next SMTP server, and I'm an admin on it (that's the mail server I was speaking of earlier in the thread) and it was its first submission. so maybe it's time you revise your jugements on how efficient debian.org mails servers are recently. -- ·O· Pierre Habouzit ··O madcoder@debian.org OOO http://www.madism.org
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