Train your Spam filters

If you have an intelligent spam filter like the one built into Thunderbird or Spam Assassin, you need to train it right.

The most common problem I’ve seen is taht people only tell the spam filter about their spam, but not about the good mails (the ‘ham’). In Mozilla, you do this by selecting all the good emails and saying “Mark this Message as Not Junk”. This is important, nay, vital information for the filter.

I did this with Spam Assassin a while back, and any time I get a spam now, I feed it back into the filter. The results are pretty impressive: My spam filter now catches 99.2% of all the spam. I’m tracking this and making a diagram from it. You can see the improvement over the untrained filter I had two months ago.

Click for full size

That’s pretty darn good. I get in excess of 100 spams a day, which isn’t as much as some of my friends get, but still bad enough.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s