Undo Send in Gmail Classic
Have you ever sent an email message you wanted to take back? This video will show you how the Undo Send in Gmail feature works and how to enable.
First, turn on Undo Send
On your computer, open Gmail.
In the top right, click Settings Settings and then Settings.
In the "Undo Send" section, check the box next to "Enable Undo Send."
In the "Send cancellation period" section, set the amount of time you want to decide if you want to unsend an email.
At the bottom of the page, click Save Changes.
After you turn on Undo Send, you can cancel sending an email.
After you send a message, you'll see the message "Your message has been sent" and the option to Undo or View message.
Click Undo.
For more info check out the official Help Center Article here
https://support.google.com/mail/answe...
