Re: [spamdyke-users] Graylisting - how effective it really is?
On Fri, May 9, 2008 at 8:24 AM, Marcin Orlowski [EMAIL PROTECTED] wrote: Hi, I wonder if anyone tried to analyze his logs to find out how effective gray listing is. I'd probably prefer to allow all incoming mails (maybe with exceptions) and even disable DENIED_IP_IN_CC_RDNS blockers as it yet causes too much collateral damages I can accept, even 99% of the mails DENIED_IP_IN_CC_RDNS deny is spam, then I got still 1% remaining - and this ususally causes some problems, but I yet like to deny mass-flood-senders. Something which graylisting still shall fight with. So - graylisting - how effective it really is for you? When I used the graylisting feature, it was very effective for us. However, we got some collateral damage from mail servers who weren't behaving properly; specifically AOL. When an AOL user would send for the first time the server would return the try again in a few minutes message back to AOL's mail server, but instead of actually trying again, AOL would just pass that message back to the user. Then we would get a call from the user saying they couldn't send us email. This happened with another ISP (can't remember who now) as well. After a dozen calls it just wasn't worth having graylisting enabled. But that's just my experience. -- Have a nice day ... unless you've made other plans. ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Graylisting - how effective it really is?
The stats we have here (small 40 person company) are pretty much evenly
split between greylisting, early talkers and realtime blacklists :D
Marcin Orlowski wrote:
Hi,
I wonder if anyone tried to analyze his logs to find out how
effective gray listing is. I'd probably prefer to allow all
incoming mails (maybe with exceptions) and even disable
DENIED_IP_IN_CC_RDNS blockers as it yet causes too much
collateral damages I can accept, even 99% of the mails
DENIED_IP_IN_CC_RDNS deny is spam, then I got still 1%
remaining - and this ususally causes some problems, but
I yet like to deny mass-flood-senders. Something which
graylisting still shall fight with. So - graylisting -
how effective it really is for you?
Regards,
--
Jacob Briggs
Systems Engineer
Core Technology Limited
Level 1, NZX Centre
11 Cable Street
Wellington
Phone +64 4 801 2252
--
Private Object doAnythingConceivable(String whatToDo, Object whatToDoItWith) {
.
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Re: [spamdyke-users] Graylisting - how effective it really is?
On Fri, May 09, 2008 at 02:24:47PM +0200, Marcin Orlowski wrote: Hi, I wonder if anyone tried to analyze his logs to find out how effective gray listing is. I'd probably prefer to allow all incoming mails (maybe with exceptions) and even disable DENIED_IP_IN_CC_RDNS blockers as it yet causes too much collateral damages I can accept, even 99% of the mails DENIED_IP_IN_CC_RDNS deny is spam, then I got still 1% remaining - and this ususally causes some problems, but I yet like to deny mass-flood-senders. Something which graylisting still shall fight with. So - graylisting - how effective it really is for you? I don't use spamdyke's graylisting; when I started using spamdyke, I already had a similar, albeit less powerful solution based on tcpsvd and some scripting. It only takes the IP of the client into account, not the sender or the recipient address. Based on some munin graphs, it appears that about 1/3 of all connecting IPs are blocked by even this primitive graylist. Andras -- Andras Korn korn at chardonnay.math.bme.hu http://chardonnay.math.bme.hu/~korn/ QOTD: A single fact can spoil a good argument. ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Graylisting - how effective it really is?
When i first installed spamdyke, I used only greylisting. No other blocks with it. Prior to spamdyke: 40-60 spams a day (my personal account) Post spamdyke: 2 in 6+ months. Now of course your millage may vary based on how you use your account, server setup, etc. But for me on a personal note, it was VERY VERY effective. DNK On Fri, May 9, 2008 at 5:37 AM, Andras Korn [EMAIL PROTECTED] wrote: On Fri, May 09, 2008 at 02:24:47PM +0200, Marcin Orlowski wrote: Hi, I wonder if anyone tried to analyze his logs to find out how effective gray listing is. I'd probably prefer to allow all incoming mails (maybe with exceptions) and even disable DENIED_IP_IN_CC_RDNS blockers as it yet causes too much collateral damages I can accept, even 99% of the mails DENIED_IP_IN_CC_RDNS deny is spam, then I got still 1% remaining - and this ususally causes some problems, but I yet like to deny mass-flood-senders. Something which graylisting still shall fight with. So - graylisting - how effective it really is for you? I don't use spamdyke's graylisting; when I started using spamdyke, I already had a similar, albeit less powerful solution based on tcpsvd and some scripting. It only takes the IP of the client into account, not the sender or the recipient address. Based on some munin graphs, it appears that about 1/3 of all connecting IPs are blocked by even this primitive graylist. Andras -- Andras Korn korn at chardonnay.math.bme.hu http://chardonnay.math.bme.hu/~korn/ QOTD: A single fact can spoil a good argument. ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Graylisting - how effective it really, is?
On 5/9/2008 [EMAIL PROTECTED] wrote: So - graylisting - how effective it really is for you? The only spam blocking I use presently is spamdyke with graylisting. Pre-spamdyke I was getting 1000 spams/day into my personal mailbox. Since installing spamdyke with graylisting I get 3-4 spams/day. Bucky ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Graylisting - how effective it really, is?
Two days ago I deleted 68,134 spam with spamdyke (without gray listing) and I received about 15-20 spam to my inbox. Today I have spamdyke with graylisting and we have deleted nearly 80,000 spam and I have received 0 spam so far. :) Dallas Crandall Backup's Plus Computer Services 208-841-5519 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of BC Sent: Friday, May 09, 2008 11:09 AM To: spamdyke-users@spamdyke.org Subject: Re: [spamdyke-users] Graylisting - how effective it really, is? On 5/9/2008 [EMAIL PROTECTED] wrote: So - graylisting - how effective it really is for you? The only spam blocking I use presently is spamdyke with graylisting. Pre-spamdyke I was getting 1000 spams/day into my personal mailbox. Since installing spamdyke with graylisting I get 3-4 spams/day. Bucky ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
