PROBLEM
With Outlook 2016 on Mac, you can sometimes "SEND" an email accidentally. This is likely because you pressed "Command + Enter" by accident. This keyboard shortcut (Command+Enter) is oddly built into Outlook 2016 on Mac to quickly send an email. To fix, we will have to override it at a Mac OS-level to prevent it on an Outlook app-level for the future.
STEPS to disable / turn off the "send" shortcut to prevent you from accidentally sending an email
- Go to the "System Preferences" app on Mac
- Keyboard
- "Shortcuts" tab
- App Shortcuts (on left side panel)
- Click "+" icon
- In the popup window, Choose "Microsoft Outlook" in the dropdown
- For "Menu title" type "Send"
- For Keyboard Shortcut, click all of these buttons one at time keeping them all pressed: function (fn), control, option, command, and 8
- You are welcome to choose another random set of keyboard buttons. This is simply a random cryptic set of button shortcuts that you are sure you will never accidentally hit.
- "Add" should now light up in blue. Click "Add."
- Your "Keyboard Shortcuts" should now look like the screenshot below.
- Quit Outlook
- Relaunch Outlook.
- It now should now never send an email when you accidentally press "Command+Enter."
SCREENSHOT for Step 10 above: Your Mac System Preferences > Keyboard > Shortcuts should now look like this...
REFERENCE