Nigeria, Jan. 27 -- However, there is something that can be done. The Undo Send tool works by delaying the delivery of an email for a user-selected period of either 5, 10, 20, or 30 seconds.

During this interval, you may cancel the message but once the delay expires, the email is sent permanently and cannot be withdrawn from the recipient's inbox.

What you can do is enable this feature in Gmail settings, selecting your preferred delay period (best at 30 seconds) before sending emails. If the option is off, emails are sent almost immediately with no opportunity to cancel. Even when enabled, the tool does not delete emails that recipients have already opened.

Email service providers, including Microsoft Outlook, operate under similar li...