If you can't send mail, but you can receive, and you're using the Mac Mail app, the cause could be malware. Here's the simple fix.
Here's a quick, one-handed way to delete an email. Once you've done it you'll wonder why you ever did it any other way!
Here's how to activate the no-app-required COVID-19 Exposure Notification Express system on an iPhone. What it does, and how it works.
Widget are an essential feature of iOS 14. Here's a brief iOS 14 Widget tutorial: what Widgets are, how to add Widgets, how to stack them.
Here's how to get the AOL calendar onto your iPhone and iPad in iOS 12, 13, and 14. AOL's documentation says it can't be done, but it's wrong.
Here's how to fix the pop-up messages saying "HPDeviceManager.framework will damage your computer" in three easy steps. (HP's method takes 12 steps.)
Here's how you password-protect a Word document on your Mac. You can require a password for opening a document and another for editing.
Here's how you password-protect a Excel document on a Mac. Step-by-step instructions. Easy as pie. Keep your private stuff private.