Gmail can't recall an email. You get 5 to 30 seconds after pressing Send to click Undo, and once that prompt is gone, the email is sent.
On a computer, "Message sent" shows at the bottom left with Undo and View message next to it. Click Undo. In the Gmail app on Android or iPhone, the confirmation reads "Sent" with an Undo option, and you tap that.
Make the window longer
You change the length in Gmail on a computer.
- In Gmail on a computer, click Settings at the top right, then See all settings.
- Next to Undo Send, choose a send cancellation period of 5, 10, 20 or 30 seconds.
- Click Save changes at the bottom.
If you need more than 30 seconds
Schedule send holds an email until a date and time you pick. Until then you can open it from the Scheduled folder and click Cancel send, which turns it back into a draft. Outlook's recall is a different feature with strict conditions, covered in how to recall an email in Outlook.
Sources
- Google — Schedule emails to send (checked Nov 9, 2026)
- Google — Send or unsend Gmail messages (computer, Android and iPhone tabs) (checked Nov 9, 2026)