Here is how you can un-send an email sent by mistake on Outlook Desktop

Sometimes, we do click on the send email button even when the content is not right or if something is missing. In such cases, if you are using the Outlook email client on a desktop (not the web version), there is a way to recall the email.
Read more about it below.
Outlook – Recall Sent Email
To recall a sent email in Outlook, you will first have to open the Outlook application and go to the ‘Sent Items’ folder and open the email you want to recall. Then double-click the email so that it opens in a new window.
After that, click on the ‘File’ option located at the top-left corner and select the ‘Resend or Recall’ option and click on ‘Recall This Message’. A new window will appear with recall options. The first one is to delete unread copies of the email, and the second option allows you to delete the email and replace it with a corrected version. You can also tick the option ‘Tell me if recall succeeds or fails’ to get a notification about the recall status. Once done, click on ‘OK’.
Press "send" too soon?
Recall or replace an email: pic.twitter.com/EXaWfEJiyM— Microsoft Support (@MicrosoftHelps) March 26, 2026
Also to add, for this feature to work, the recipient should also be using the Microsoft Outlook desktop client on both Mac/windows. Furthermore, the recipient should not have opened the email yet for the recall feature to work. While this is a useful feature, there is no 100% guarantee that it will work every time, so it is always better to double-check before hitting the send button.
Stay tuned for more such updates.