How To Unsend Emails In

The web version of has a useful feature of undoing sent emails. This feature is disabled by default but can be turned on.

Here’s how:

Login to

Click on the gear icon from the top right and select View all Outlook settings.

accessing settings

accessing all settings

Next, choose Mail > Compose and reply.

Mail related options in

Scroll down to Undo send section and drag the slider to right.

Undo send feature in

The maximum interval up to which the emails can be unsent is 10 seconds.

enabling the Undo send feature in for 10 seconds

Click Save for these changes to take place.

saving Undo send related changes in

Now whenever emails are sent using, a pop-up at the bottom left of the screen will be visible prompting to undo the sent email. This prompt will be visible for the time interval selected from the Undo send section after which the email will be sent.

prompt to unsend email messages in

When the Undo button is clicked, the email message will be restored to its draft form.

Also, there is another useful feature which though is already enabled by default. It’s about reminder for missing attachments.

The settings for it can be changed from Mail > Attachments and disabling the option of Warn me when I send a message that may be missing an attachment.

Attachments related settings in

By default, email messages which are supposed to have attachments but don’t will be held off and you’d get a reminder to add the attachments if any.


Attachment reminder pop-up in

Happy emailing.

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