Akismet is a spam filtering plugin for blogs. It stands for Automattic Kismet – Automattic is the company which funds the project and also employs most of the WordPress developers. Kismet meaning fate or fortune. I guess that means that Akismet gives spam bloggers what they deserve – no recognition, money or links.
Akismet is built into WordPress version 2 and available for other platforms. A list is here and includes Drupal, Movable Type and Expression Engine. It is free for non-commercial use, which Automattic define as making less than US$500 a month from your blog.
This site doesn’t exactly have the worlds largest readership, but I still manage to get blog comment spam, particularly when I write about money. So when I rebuilt this server about a month ago I went off and registered for Akismet by signing up for a wordpress.com account. Since then Akismet has blocked 110 spam comments from being posted (and deleted) on my blog, including 4 in the last 24 hours.
The way Akismet works: when a new comment, trackback, or pingback comes to your blog it is submitted to the Akismet web service which runs hundreds of tests on the comment and returns a thumbs up or thumbs down. The statistics say that 93% of all comments are spam.
I know Google’s Blogger uses image recognition to block automatic comment posting. Do any of you guys out there get a lot of spam on your sites? What do you do to keep it under control?