Training SaneBox is really easy. Just move the email to the correct folder, and we'll get it right next time!
Different ways to train SaneBox:
What should go in each Sane folder?
The theory behind @SaneLater, @SaneNews, and @SaneBulk is that these are emails that shouldn't interrupt your day.
Each afternoon, you receive an email summary of the new, unread email in these folders. The summary is meant to allow you to breeze through those emails, you haven't seen yet, quickly all at one time. If you feel like you are missing emails, you can ask to have the summary come more often by visiting your Email Notifications section in the Account Settings tab.
How long does training take?
How Do I Drag and Drop in the Gmail web interface?
In the Gmail web interface, if you mouse over the checkbox you will see 3 vertical dots appear to it's left. That is the place to "grab" if you want to drag and drop an email. Your mouse is in the right place if your cursor turns into a hand.
You can also check the box and use the "Move to" pull down menu which you get by clicking the Folder icon.