Forum Moderators: phranque
Can anyone recommend an email package (Apache server based) which will do the following;
1) Allow recognized emails through.
2) Allow seemingly genuine (according to configurable rules) emails through.
3) Block all suspect emails - replying to them asking them to click a link to have the email sent to me.
I have looked, and can not find anything that fits. Mind you, I used Google (dig), so that does not surprise me right now.
Although it's officially a prerelease, spambayes is the most effective filter of those I have tried by quite a margin. You will need a few hundred good and bad messages to train the system, and after that it will automatically classify everything that comes in.
In contrast to most other bayesian filters, spambayes has three categories: "spam", "ham", and "unsure". It is extremely rare that anything in the "spam" and "ham" categories gets misclassified (haven't had a false positive yet). The "unsure" category will collect stuff in between, and in most cases it's evident by looking at those that they're really hard to classify.
Spambayes made it possible for me to reduce my custom procmail ruleset to a fraction of what I needed before. I also use Spamassin for its automatic blocklist support, but that's really the only feature of SA that adds anything useful to my setup.
It's a challenge response system. There are some hurdles you have to overcome when using it (just like any anti-spam system), but I find that it seems to work quite nicely.
