1, 2, 3, 4 I declare a Spam War!
I get 125+ spam messages a/day. Most of them get filtered by SpamSieve on the client side.
In theory, my hosting provider uses Spam Assassin, but dialed down so high its been mostly pointless.
Meanwhile at work, we had no spam filtering at all, other then this TDMA challenge response system that I immediately disabled.
So when I looked into spam solutions for work I was intrigued by spamstopshere for my own use. It has the reputation for being the most accurate, and additionally, you can actually tell how much it will cost you by browsing their website, something that isn’t true for BrightMail or Postini.
Server-side spam filtering is far superior to the client-side spam filtering I was using previously, SpamSieve. The server do a lot of things to make sure that its really talking to a real mail server and not a spam blaster. That can help you filter out 75-80% of the spam immediately, with _zero false positives. Additionally, with client-side filtering when you have spam that are really obviously spam you still have to review them. With so much volume, you eventually stop bothering, which means any false positive is a bigger deal. If the server can dump all the obvious crap up front, then you only have to review 1-2 “possibles”/day, which I can easily deal with. 125/day was too much though, so I wouldn’t do it and soon I would have 2000 spam messages to review. I’d try to review them, but I’d get frustrated and give up…
Note that I don’t really consider Spam Assassin “server-side” filtering, because it filters the Spam AFTER the mail server has accepted the spam, which means its missing the filtering you can get practically for free.
So a spam filtering service was the way to go. And SpamStopsHere looked the the best of them.
The road wasn’t perfectly smooth however.

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