Zitat:Akismet for MyBB is a plugin built to prevent spam using the Akismet
services.

Please report any bugs here: http://community.mybboard.net/thread-5896.html

Installation instructions:
1) Download and extract the attached zip file.
2) Upload the contents of the folder to your MyBB directory
3) Activate the plugin via the ACP
4) You will need to input your Wordpress API key in the Akismet Settings
before it will work. See http://wordpress.com/api-keys/ for more details.