I use a something called ASSP, which is Anti-Spam SMTP Proxy. Not foolproof, completely, but highly configurable, the system learns from the spam reports sent to it reasonably well, and cuts our spam down by at least 95-98%.
Oh, and it's free. I run it on spare hardware I had lying around. Doesn't seem to be CPU intensive, and not all that hard to get working. I actually have my email hosted elsewhere (outsourcd) but by using firewall rules and DNS entries, all incoming and most outgoing mail runs through it. ++++++++++++++++++++++++++++++++ <insert witty tagline here> ----- Original Message ----- From: "Jeremy Parr" <jeremyp...@gmail.com> To: "WISPA General List" <wireless@wispa.org> Sent: Monday, July 13, 2009 5:28 PM Subject: Re: [WISPA] Re-evaluating our anti-spam solution > 2009/7/13 Jeremy Parr <jeremyp...@gmail.com>: >> 2009/7/13 Don Grossman <d...@willitsonline.com>: >>> It seems time to take a look at our anti-spam solution. Currently we >>> are looking to replace out Barracuda due to ongoing issues with the >>> box that after several attempts to work with Barracuda can not be >>> resolved. Barracuda is helpful but like to point at other things like >>> DNS and unrelated stuff. In the end they log into the box after >>> wasting time so something to kick the box and we are good for an >>> undetermined amount of time. >>> >>> The Barracuda gives us a few features that we like such as an in house >>> box that we are not paying per email address or domain. Also the per >>> user configurability is great for letting users independently control >>> their white and blacklists. >>> >>> In a nutshell what products should we look at that offer us similar >>> features as the Barracuda box. >> >> You can roll your own with Postfix and a few addons. After looking at >> the configuration options for a lot of the Postfix addons, you come to >> the realization that with a few hours of work, you can have all of the >> software tools used by the Barracuda internally, and have root access >> to the box to fix it yourself when it goes south, instead of waiting >> on them. You can also throw in things like redundant hard drives, and >> redundant power. How a company can market a $3k+ device with a single >> IDE drive in good conscience is beyond me. >> >> I can't find the link right now, but there is a package that provides >> users with an accessible, configurable quarantine, just like the >> Barracuda. I'll post the link as soon as it turns up. >> > > http://www.maiamailguard.com/maia/wiki > http://mailgraph.schweikert.ch/ > http://www.arschkrebs.de/postfix/queuegraph/ > http://www.logreport.org/ > http://pfqueue.sourceforge.net/ > http://www.policyd.org/tiki-index.php > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
