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jfitz
Junior Member
USA
345 Posts |
 Posted - 15 August 2003 : 09:50:45
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We just discovered SpamFilterISP recently, and have been trying it out, and are quite pleased. It's for everyone - you should be an ISP or should run your own email server (which we do).
It's an email checker that sits in front of your existing email server, and examines each email to determine whether to forward it, or to quarantine / trash it. It uses a combination of black lists, white lists, and your own rules to screen all incoming emails and decide what to do with them.
You can try it for free here: http://www.logsat.com/SpamFilter/ The company permits you to try the full software package for an unlimited evaluation period.
NOTE: I have no interest in or affiliation with LogSat (the producer). We discovered this software by accident, and decided to try it. So far we like it - it's not perfect, but it does a decent job. For example, on a typical weekday, my personal SpamNix filter catches about 150 messages. Today it had fewer than 50, as the others had already been discarded by SpamFilterISP. |
--Jördan
It's a wasted day if you don't spend at least part of it flying upside down. |
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lofty
Junior Member
USA
158 Posts |
Posted - 15 August 2003 : 12:30:25
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This kind of SPAM filtering is really on its way out. Sure you can block by IP, or domain names, but most of the time the domains are forged, and grabbing the source ip (or ip of the open relay server) is extremely time consuming. The keyword filtering is useless, because spammers can get around that by changing the words in clever ways, like p0rn, <!--76tyfhgn-->po<!--jfu8976rt-->rn, etc.
A much better way to filter is through statistical analysis, using some of the Bayesian filters out there.
Here is a good article on this approach:
http://www.paulgraham.com/spam.html
POPFile is a very good client side filter (free), and it now comes with an SMTP proxy that you can put in front of your email server.
http://popfile.sourceforge.net
Another Bayesian server-side filter can be found here:
http://assp.sourceforge.net |
Edited by - lofty on 15 August 2003 12:31:34 |
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taropatch
Average Member
USA
741 Posts |
Posted - 15 August 2003 : 15:54:25
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POPfile sound very interesting. I'm definitely reaching a point where SPAM is out of control so such a program sounds extremely helpful.
Thanks for the links everyone. Anyone have good or bad things to say about the above programs? |
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lofty
Junior Member
USA
158 Posts |
Posted - 15 August 2003 : 17:11:39
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Popfile really works, and many people have reported over 95% accuracy. Once you train it to recognize spam, it works amazingly well. You can even create buckets for Autoresponses, or filter emailed job listings based on things you are or are not interested in.
Personally, I use an Outlook add-in called Outclass (http://www.vargonsoft.com/Outclass), which installs a little toolbar in Outlook XP. When mail comes in, it uses the POPFile statistical engine to determine if it is SPAM or not. If it ever misclassifies something, you just simply select the email, and then click the "Mark as spam" button on the Outclass toolbar. |
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taropatch
Average Member
USA
741 Posts |
Posted - 06 November 2003 : 11:39:10
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I finally installed and setup POPfile. Previously I had set up some rules in Outlook Express to filter out some SPAM but it became too much for my simple filters.
POPfile seems to be doing the job. It's classifying SPAM well and I've barely trained it. It should only improve.
Cool program. |
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Gremlin
General Help Moderator
New Zealand
7528 Posts |
Posted - 06 November 2003 : 20:06:09
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| cloudmark.com has a great program though its not free, also look into SAProxy thats one of my other favourites. |
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