[KoRn]

This is a How-To I found online using Linux and open source software to create an email gateway/firewall for SPAM/bad email. At work we had been having a terrible time fighting spam, after numerous complaints by users, and the viewing of demos for expensive anti spam solutions I turned to the world of open source. I work for a non-profit orginization that doesn't have the financial resources to spend thousands of dollars on email filtering technologies, so I did some looking around and found this.

I followed this manual and in just three days it has blocked 17,620 spam emails and over 500 viri, and it didn't cost a thing. The spam has been reduced so much users have called to see if there was something wrong with our emeail system. If you are in IT and find yourself in a similar situation, I highly recommend this!

[KoRn]

Ping.

[perfect_rovian_storm]

You should consider installing CentOS instead of Fedora Core*.

CentOS is basically Redhat Enterprise without the pricetag. You get all the updates and none of the 'EOL' issues that you get with FC*.

http://www.centos.org

I run it on all of our company servers and started at home about a year ago with it.

I realize this is a bit off-topic, but your how-to should be the same for CentOS as well.

[KoRn]

"emeail system"

We also have an email system :p

[SunkenCiv]

Perhaps of interest (not for pinging, just reading)?

[Echo Talon]

The spam has been reduced so much users have called to see if there was something wrong with our emeail system.

as long as its not blocking legit mail I guess its ok.

[snowsislander]

You might also be interested in Mailscanner.

[ShadowAce]

[KoRn]

Just an update to this thread regarding the performance of the email gateway.

It's been almost 5 days now.

Spam messages blocked: 28,496
Viri and bad file types blocked: 862

And 1,000 happy email users, along with 1 satisfied admin! =)

[KoRn]

Just an update to the thread.

As of today this open source email spam filter has blocked 81,732 spam email messages and 1,349 virus infected messages in less than two weeks. So far, no false positives and no bugs. I just need to get this thing onto a server! Right now it's running on a little 1.5GHz desktop PC!! A windows machine processing this much data would have died in a day or less lol. This one hasn't even needed a reboot yet haha.