Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
I was wondering if there was any way that I could make my mail system respond to emails received with a link that says something to the effect of, "If you're a human, click here to be allowed." I've done some searching on Google, and haven't found a really good system. Ideas? -- Jessie Morris

Re: Spam Challenge-Response system

2009-04-09 Thread Shane Hathaway
Jessie Morris wrote: I was wondering if there was any way that I could make my mail system respond to emails received with a link that says something to the effect of, "If you're a human, click here to be allowed." I've done some searching on Google, and haven't found a really good system. Idea

Re: Spam Challenge-Response system

2009-04-09 Thread Michael Torrie
Jessie Morris wrote: > Postgrey was almost exactly what I was looking for. :) With Postgrey it's > almost completely automatic. > > For anybody else looking for this kind of system, here's a pretty good link > talking about how to do it. > > http://www.roedie.nl/wiki/index.php/Spam_Filtering_Wi

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
On Thursday 09 April 2009 1:17:11 pm Shane Hathaway wrote: > Jessie Morris wrote: > > I was wondering if there was any way that I could make my mail system > > respond to emails received with a link that says something to the effect > > of, "If you're a human, click here to be allowed." I've done s

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
On Thursday 09 April 2009 2:44:19 pm Michael Torrie wrote: > Jessie Morris wrote: > > Postgrey was almost exactly what I was looking for. :) With Postgrey it's > > almost completely automatic. > > > > For anybody else looking for this kind of system, here's a pretty good > > link talking about how

Re: Spam Challenge-Response system

2009-04-09 Thread Stuart Jansen
On Thu, 2009-04-09 at 14:44 -0600, Michael Torrie wrote: > Greylisting has worked very well for me. In fact I get so few spam > message through that I can't even train dspam. Don't listen to him! He's lying! Grey listing doesn't work and never has. Don't waste your time. It isn't even worth it. I

Re: Spam Challenge-Response system

2009-04-09 Thread Dave Smith
Stuart Jansen wrote: But if everyone else starts greylisting, spammers will get smarter What?! Greylisting makes spammers smarter? Yikes! --Dave /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
On Thursday 09 April 2009 3:34:24 pm Dave Smith wrote: > Stuart Jansen wrote: > > But if everyone else starts greylisting, spammers will get smarter > > What?! Greylisting makes spammers smarter? Yikes! > > --Dave > > /* > PLUG: http://plug.org, #utah on irc.freenode.net > Unsubscribe: http://plug.

Re: Spam Challenge-Response system

2009-04-09 Thread Brandon Stout
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jessie Morris wrote: > We should make some penalty for those that spam us. We should create a log of > our most sent spammer IP's or something and post their email addresses on the > internet.. Too bad most of the spam IP's are just open relays.

Re: Spam Challenge-Response system

2009-04-09 Thread Michael Torrie
Brandon Stout wrote: >> We should make some penalty for those that spam us. We should create a log >> of >> our most sent spammer IP's or something and post their email addresses on >> the >> internet.. Too bad most of the spam IP's are just open relays... :( > > That's already been done.

Re: Spam Challenge-Response system

2009-04-09 Thread Brandon Stout
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Michael Torrie wrote: > I'm not convinced that RBLs are effective anyway. When I worked at Verio, if we installed the sendmail RBLs, it would bring an immediate halt to almost all their spam. It definitely works. Furthermore, I never ran into anyone

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
On Thursday 09 April 2009 3:58:54 pm Brandon Stout wrote: > Michael Torrie wrote: > > I'm not convinced that RBLs are effective anyway. > > When I worked at Verio, if we installed the sendmail RBLs, it would > bring an immediate halt to almost all their spam. It definitely works. > Furthermore, I

Re: Spam Challenge-Response system

2009-04-09 Thread Corey Edwards
On Thu, 2009-04-09 at 15:53 -0600, Michael Torrie wrote: > Brandon Stout wrote: > >> We should make some penalty for those that spam us. We should create a log > >> of > >> our most sent spammer IP's or something and post their email addresses on > >> the > >> internet.. Too bad most of the

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
Just out of curiosity, how many spam emails do you guys receive a week? -- Jessie Morris signature.asc Description: This is a digitally signed message part. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */

Re: Spam Challenge-Response system

2009-04-09 Thread Clint Savage
On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris wrote: > Just out of curiosity, how many spam emails do you guys receive a week? > > -- > > Jessie Morris Jessie, I found what I was looking for when we talked last night. http://tmda.net/ Hope that helps. Clint /* PLUG: http://plug.org, #utah on

Re: Spam Challenge-Response system

2009-04-09 Thread Joel Finlinson
On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris wrote: > Just out of curiosity, how many spam emails do you guys receive a week? > -- > Jessie Morris > Currently in my GMail spam folder (which I never see): 1708 In the main inbox: 3 have slipped through in the past month. /* PLUG: http://plug.o

Re: Spam Challenge-Response system

2009-04-09 Thread Dave Smith
On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris wrote: Just out of curiosity, how many spam emails do you guys receive a week? I have received 100 spam emails today, and SpamAssasin has caught 66,577 since I started using it. I'm not sure how long I've been using it because the dates on th

Re: Spam Challenge-Response system

2009-04-09 Thread Stuart Jansen
On Thu, 2009-04-09 at 16:22 -0600, Jessie Morris wrote: > Just out of curiosity, how many spam emails do you guys receive a week? I saw an actual spam email make it to my inbox a little more than a month ago. Why? -- "XML is like violence: if it doesn't solve your problem, you aren't using enoug

Re: Spam Challenge-Response system

2009-04-09 Thread jessie
> On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris > wrote: >>> Just out of curiosity, how many spam emails do you guys receive a week? >>> > > I have received 100 spam emails today, and SpamAssasin has caught 66,577 > since I started using it. I'm not sure how long I've been using it > because the da

Re: Spam Challenge-Response system

2009-04-09 Thread Gabriel Gunderson
On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris wrote: > Just out of curiosity, how many spam emails do you guys receive a week? I'm sorry, I'd love to answer this, but I'm busy at the moment. Would you mind asking again in a few minutes. THANKS! Gabe /* PLUG: http://plug.org, #utah on irc.fre

Re: Spam Challenge-Response system

2009-04-09 Thread Jessie Morris
On Thursday 09 April 2009 4:41:17 pm Stuart Jansen wrote: > On Thu, 2009-04-09 at 16:22 -0600, Jessie Morris wrote: > > Just out of curiosity, how many spam emails do you guys receive a week? > > I saw an actual spam email make it to my inbox a little more than a > month ago. Why? Nooo how

Re: Spam Challenge-Response system

2009-04-09 Thread Jonathan Duncan
On 09 Apr 2009, at 16:48, Gabriel Gunderson wrote: On Thu, Apr 9, 2009 at 4:22 PM, Jessie Morris wrote: Just out of curiosity, how many spam emails do you guys receive a week? I'm sorry, I'd love to answer this, but I'm busy at the moment. Would you mind asking again in a few minutes. TH

Re: Spam Challenge-Response system

2009-04-10 Thread Jonathan Ellis
This idea was fairly popular a few years ago but has mostly been dropped since other methods that aren't so annoying for non-spammers do a pretty good job. But some people are still working on them, e.g. http://tmda.sourceforge.net/cgi-bin/moin.cgi/FrontPage On Thu, Apr 9, 2009 at 1:35 PM, Jessie

Re: Spam Challenge-Response system

2009-04-10 Thread Andy Bradford
Thus said Jessie Morris on Thu, 09 Apr 2009 12:35:45 MDT: > I was wondering if there was any way that I could make my mail system > respond to emails received with a link that says something to the > effect of, "If you're a human, click here to be allowed." I've done > some searching on

Re: Spam Challenge-Response system

2009-04-10 Thread Andy Bradford
Thus said Michael Torrie on Thu, 09 Apr 2009 14:44:19 MDT: > I have noticed, though, that over the last year or two more and more > spam bots are calling back and delivering their spam. Maybe we need to > combine greylisting with some kind of tarpit idea. Where we hold onto > their connection f

Re: Spam Challenge-Response system

2009-04-10 Thread Moises Morales
This is what I have found very effective (doing them all in that order): 1.- Reject any attempt to deliver an email if the other host does not have a reverse DNS (just on that I reject about 40 thousand email delivery attempts). 2.- Check if the other host dns has a dynamic looking address (at le

Re: Spam Challenge-Response system

2009-04-10 Thread Andy Bradford
Thus said Michael Torrie on Thu, 09 Apr 2009 15:53:01 MDT: > And they are nightmare to get off of if you ever find yourself on the > list, either because of a misconfiguration (some lists have more than > just relaying hosts in them), or because of a mistake on someone > else's part. I'm n

Re: Spam Challenge-Response system

2009-04-10 Thread Jessie Morris
On Friday 10 April 2009 12:53:45 pm Andy Bradford wrote: > Thus said Michael Torrie on Thu, 09 Apr 2009 14:44:19 MDT: > > I have noticed, though, that over the last year or two more and more > > spam bots are calling back and delivering their spam. Maybe we need to > > combine greylisting with so