In Gmail, I send a email then I receive a pop up at left bottom corner:
What is the use of "Undo" option in this pop up?
Gmail Notification – What is the Use of ‘Undo’?
gmailinbox-by-gmail
Related Solutions
Yes - use Google Apps for Your Domain.
It's free for up to 50 users.
Free GAFYD (as provided by Tobbe below)
UPDATE This answer is no longer valid if you don't already have a Google Apps account. Google Apps is no longer free for new signups!! (Thanks to asalamon74 for the update)
If you make a typo or regret sending a message, you can undo the action by enabling "Undo send." This setting gives you the option to take back a message you just sent.
To enable Undo Send:
- Click the gear in the top right
- Select Settings.
- Scroll down to "Undo Send" and click Enable.
- Set the cancellation period (the amount of time you have to decide if you want to unsend an email).
- Click Save Changes at the bottom of the page. If you had Undo Send turned on in Gmail Labs, your Undo Send setting will be on by default.
Note: To give you time to undo, Gmail delays sending the message for a few seconds. So if you don't select "Undo" within the time limit, your message will be sent. "Undo send" may not work if you experience connection issues.
Taken from this Google Support article.
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Best Answer
From a Google answers question:
and
Google keeps the mails on its servers for the time you specify here. That's how they can actually implement this: they don't immediately send your mail. The default (and minimum) time is 5 seconds.
The mail does not get deleted, you can e.g. edit it and resend.
Note: there are people claiming that in the case of sending mail to another Gmail account, the message is send immediately, because Google "can remove the message from the recipient's inbox."
I have not yet seen proof of that, and I doubt it is true, because it would raise privacy issues.