If you prefer not to go offline every time you compose an email, Gmail can give you a few seconds to undo sending any messages, too.
Unsend Email with Gmail Offline
To take back a message sent with Gmail:
- Make sure you are disconnected while composing your message.
- Send the email as usual.
- Before going online, open the Outbox.
- Check the message you want to unsend.
- Click Move to Drafts.
Under Drafts, you can now edit the message to make the desired changes and send it again. Of course, you can also delete the unsent email, right in the Outbox or under Drafts.