The EasyList has handy links that allow you to record completed events right from the email in your mail client. 

Recording completed events

To record a completed event from your EasyList, click on the the task or activity name. 

If you are already logged into EasyKeeper, this will automatically open the record event form. If you are not logged in, you'll be landed on the Log In page, and once you log in, the record event form will display.