If your email app has an Undo Send option, click it immediately after sending
In Gmail, use Undo Send within the short cancellation window after sending
In Outlook, use Recall This Message if both you and the recipient use Microsoft Exchange and the message has not been opened
In Apple Mail, use Undo Send if the feature is available and the message has not left the delay window
If no unsend feature is available, send a follow-up email asking the recipient to ignore the previous message
If the email was sent to the wrong person, contact the recipient directly and request deletion
If the email contains sensitive information, change passwords or revoke access to shared links if needed
Check your email settings to enable or extend the send delay for future emails