Sometimes, for some reason, Mail stops working. We don't usually know why. But, sometimes you can fix it with a couple of clicks. Here's how.
There's always another way to do things-- sometimes a better way! Here's the easiest way to send a file via the Apple Mail app.
Put frequently-needed Mail folders into the favortites bar at the top of the Mail window. Quick and easy access. You'll use these a lot.
Add text labels to toolbar buttons, making them easier to identify & easier to click on (because they're bigger). Works in Finder, Preview, Mail, and more.
If Mail seems stuck, try going to the Window menu and choosing "Activity" and also "Connection Doctor." You'll learn a lot there.