How to Unsend an Email in Gmail Before It Reaches the Recipient

There are few feelings worse than clicking “Send” on a highly critical, professional email to your boss, only to instantly realize you forgot to attach the PowerPoint presentation, or worse, you accidentally replied to the entire company.

To prevent this catastrophe, Google built a native “Undo Send” feature directly into Gmail. This feature artificially delays the transmission of your email for a few seconds, giving you a tiny window of opportunity to panic, click a button, and yank the email back out of the server queue before it actually leaves your outbox.

How to Use Undo Send

The feature is active by default, but it only gives you five seconds to react.

1. Compose an email normally and click the blue Send button.
2. Immediately look at the absolute bottom-left corner of your Gmail screen. A small black pop-up box will appear stating “Message sent.”
3. Next to that text, you will see a bright white link that says Undo.
4. Click Undo as fast as you can.

The black box will instantly change to say “Sending undone.” Gmail will rip the email out of the outgoing queue and automatically pop it back open on your screen as a draft, allowing you to attach the missing file or delete the embarrassing typo before attempting to send it again.

How to Increase the Time Limit (Crucial)

Five seconds is rarely enough time to realize you made a mistake. You must manually increase this safety window to the absolute maximum allowed by Google.

1. Open Gmail on a desktop computer (you cannot change this setting from the mobile app).
2. Click the Gear icon in the top-right corner, then click See all settings.
3. Under the default “General” tab, scroll down slightly until you find the row labeled Undo Send.
4. Click the drop-down menu next to “Send cancellation period.”
5. Change it from 5 seconds to 30 seconds.
6. Scroll all the way to the absolute bottom of the page and click the Save Changes button.

Now, whenever you click Send, that black “Undo” box will hover on your screen for a full half-minute, giving you plenty of time to double-check your work before the email is permanently deployed.