Let's say you've just sent an email message to someone by mistake in Outlook.com. How do you recall it?
Unfortunately, you can't.
Message recall is not available for users with email addresses ending in @outlook.com, @hotmail.com, @live.com, or @msn.com. These are web-based email services where once you send an email message, it's gone from your email server and out of your control.
Message recall is available in Outlook for Windows. See Recall or replace an email message that you sent for instructions.
Undo sending in Outlook.com
Although you can't recall a message once it's been sent, when you turn on the undo send option, Outlook.com delays sending the message so you can cancel it if you change your mind.
You can delay sending your message for 5 or 10 seconds. To turn on the undo send option:
At the top of the page, select Settings > View all Outlook settings.
Select Mail > Compose and reply.
Under Undo send, choose the how long Outlook.com will wait to send your messages.