> I'm glad that the content filter is working FOR YOU. For me, with 100-300
> emails/day, and a lot of spam, it just can't. I tried to filter out 60%
> of the spam.(As I said, with lies, mispellings, etc... You just can't catch
> it all.) Several valid emails get trapped in my spam folder. I researched
> it, and there is no way to catch as much spam without having them rejected
> as well.
I really encourage you to try Spamprobe:
http://spamprobe.sourceforge.net/
There are several ways to filter based on content. If, for example, you
simply mark every email with "viagra" in it as spam, you are undoubtedly
going to get some false markings (like this email!).
Spamprobe relies on a frequency analysis of *all* the words (and
headers) in your email and comes up with an estimate of how likely an
email is spam. So, if an email contains just "viagra", it's not likely
to be marked spam. If it contains that, plus a bunch of other words or
phrases common to spam, it is more likely to be marked.
And you train it. If you feed spam back into it, it learns what phrases
are more likely to be spam than others. And you feed it good email too,
so that it learns what phrases are usually good.
I've used it for 6 months now. Apart from a few simple procmail rules
(to catch Asian emails), it's my only spam filter and I catch 95% of my
spam with maybe 1 false positive a week. This is based on 200-400
emails a day. And with procmail, all the spam can get put into one
folder, which I can quickly scan once a day to look for the false positives.
Really ... give it a try.
- Colin
