Change the Undo Send Delay Time

Apple added a useful new feature to the Mail app in iOS 16 that lets you set a delay between when you hit the Send button on an email and when it’s actually sent out. This gives you a small 10–30 second window to undo an email you’ve just sent. If you’ve ever sent emails late at night, you probably know how this feature can come in handy. 

By default, it’s set to a 10-second time delay, but you can change it like this:

1. Open the Settings app on your iPhone.
2. Scroll down and select Mail.
3. Scroll down again and select Undo Send Delay.
4. Choose the delay time you want. 

You can also set the delay to “off” if you’d prefer that your messages be sent immediately like they were before iOS 16 came along.