Check All Accounts for New Mail Quickly in The Bat!

According to Guinness World Records, the fastest growing plant is -- don't prepare for a surprise, you already know it -- bamboo. Which is why they like to label coffee filters made from bamboo as produced in a very, very, very sustainable manner.
If your mailboxes grow with 0,00003 km/h (0.00002 mph), too, the fastest way to fetch new mail in The Bat! is -- a keyboard shortcut:
Get all my new mail, and get it fast! Here's how to make The Bat! fetch new mail in all your accounts quickly.