Drupal Groups Email Filtering
Posted by cafuego on Sunday 10 June 2012.
Many Drupal users and developers are members of groups.drupal.org and will be getting email from the site when people post new messages and replies to threads. Of these people, many probably also like to organise their email in folders, for easy reference in the future.
A common way to do this is by creating email filter rules that look at email subject lines or other headers and perform an action based on what these headers contain.