Re: spammers getting less stupid?

2012-12-24 Thread Kevin Chadwick
I finally got to deploying greyscanner on my mailservers, and did something similar: trap every recipient address with two or more digits in the user part (one digit could be a typo, say a '2' before the '@'). This catches most of it. I forget, did you previously say whitelisting with

Re: spammers getting less stupid?

2012-12-23 Thread Jan Stary
I see it too. I also use greyscanner to catch spammers and I see a lot of spam to random numbers and letters@mydomains. So I trap all hosts sending to addresses with numbers in them (as I don't have any legit accounts with numbers). This catches almost all spam. I finally got to deploying

Re: spammers getting less stupid?

2012-11-07 Thread Joakim Aronius
(It seems like some of my mail do not go through to misc@, perhaps some of my ISPs outgoing mailservers are blacklisted..?) * Peter N. M. Hansteen (pe...@bsdly.net) wrote: http://undeadly.org/cgi?action=articlesid=20120604050025 and references therein show a 'works for me' example config

Re: spammers getting less stupid?

2012-11-05 Thread Rod Whitworth
On Mon, 5 Nov 2012 07:52:50 +0100, Joakim Aronius wrote: * Kurt Mosiejczuk (kurt-openbsd-m...@se.rit.edu) wrote: Jan Stary wrote: Strangely, the only occurence of 2.139.201.210 in the last month's maillog is just this; that's half an hour after it got WHITE. What happend at Mon Oct 29

Re: spammers getting less stupid?

2012-11-05 Thread Peter N. M. Hansteen
Rod Whitworth glis...@witworx.com writes: I have had a stack of both sides of the invalid address email stuff for some time. I make all the ficticious addresses into spam traps. That way I punish the fools whose servers return mail whence it came not. They just get tarpitted and I don't

Re: spammers getting less stupid?

2012-11-05 Thread Stuart Henderson
On 2012-11-01, Jan Stary h...@stare.cz wrote: Anyway, it seems (some) spambots got less demented and actually do resend, getting themselves whitelisted - thus working themselves around the whole premise of greylisting. Not the whole premise... A good part of it is to just delay the mail, this

Re: spammers getting less stupid?

2012-11-04 Thread Joakim Aronius
* Kurt Mosiejczuk (kurt-openbsd-m...@se.rit.edu) wrote: Jan Stary wrote: Strangely, the only occurence of 2.139.201.210 in the last month's maillog is just this; that's half an hour after it got WHITE. What happend at Mon Oct 29 14:49:24 CET 2012 that made it WHITE? Anyway, it seems

Re: spammers getting less stupid?

2012-11-02 Thread Jamie Paul Griffin
/ Kurt Mosiejczuk wrote on Thu 1.Nov'12 at 16:02:06 -0400 / Jan Stary wrote: Strangely, the only occurence of 2.139.201.210 in the last month's maillog is just this; that's half an hour after it got WHITE. What happend at Mon Oct 29 14:49:24 CET 2012 that made it WHITE? Anyway, it seems

Re: spammers getting less stupid?

2012-11-02 Thread Kevin Chadwick
For instance on one mailserver I took over, I noticed that after adding a Spamhaus sbl-xbl check, required rDNS, and other basic stuff like requiring a legitimate HELO/EHLO, spam attempts dropped by perhaps a factor of 100. It was shocking. When you required rDNS I bet false positives went

Re: spammers getting less stupid?

2012-11-02 Thread Kevin Chadwick
For instance on one mailserver I took over, I noticed that after adding a Spamhaus sbl-xbl check, required rDNS, and other basic stuff like requiring a legitimate HELO/EHLO, spam attempts dropped by perhaps a factor of 100. It was shocking. Required rDNS, so false positives went up by a

Re: spammers getting less stupid?

2012-11-02 Thread Nicolai
On Fri, Nov 02, 2012 at 09:55:56AM +, Kevin Chadwick wrote: When you required rDNS I bet false positives went up by a factor of 1000. No, legitimate traffic remained steady and not a single complaint was registered. YMMV. Back on topic, in my personal experience, spamd is more effective

Re: spammers getting less stupid?

2012-11-01 Thread Kurt Mosiejczuk
Jan Stary wrote: Strangely, the only occurence of 2.139.201.210 in the last month's maillog is just this; that's half an hour after it got WHITE. What happend at Mon Oct 29 14:49:24 CET 2012 that made it WHITE? Anyway, it seems (some) spambots got less demented and actually do resend,

Re: spammers getting less stupid?

2012-11-01 Thread Mark Felder
On Thu, 1 Nov 2012 20:49:39 +0100 Jan Stary h...@stare.cz wrote: After cleaning my spamdb on the first of last month, I see that there are 572 WHITE hosts now. Only a handfull of those are legitimate (my mailserver is very low traffic, basically just mail for my family). Looking at the

Re: spammers getting less stupid?

2012-11-01 Thread Constantine A. Murenin
On 1 November 2012 12:49, Jan Stary h...@stare.cz wrote: Here is a typical host: WHITE|2.139.201.210|||1351517497|1351518564|1354630766|2|1 which is 210.red-2-139-201.staticip.rima-tde.net. It tried to connect at Mon Oct 29 14:31:37 CET 2012, and got WHITE at Mon Oct 29 14:49:24 CET 2012.

Re: spammers getting less stupid?

2012-11-01 Thread Nicolai
On Thu, Nov 01, 2012 at 08:49:39PM +0100, Jan Stary wrote: After cleaning my spamdb on the first of last month, I see that there are 572 WHITE hosts now. Only a handfull of those are legitimate (my mailserver is very low traffic, basically just mail for my family). You and I have similar