afew is an initial tagging script for notmuch mail:

• http://notmuchmail.org/
• http://notmuchmail.org/initial_tagging/

Its basic task is to provide automatic tagging each time new mail is registered with notmuch. In a classic setup, you might call it after 'notmuch new' in an offlineimap post sync hook.

In addition to more elementary features such as adding tags based on email headers or maildir folders, handling killed threads and spam, it can do some heavy magic in order to /learn/ how to initially tag your mails based on their content.