Yahoo is rolling out a new update for its Mail app, one that offers that offers a couple of interesting new capabilities. Of primary interest is 'Undo Send,' which allows you to cancel an email that you've accidentally sent, much as you can do with Gmail.
Here's what to expect with Yahoo Mail 4.5:
Quickly un-send emails - Instantly undo any email immediately after it has been sent.
Quickly find a contact's phone number and email address - When searching for a contact, their phone number and email address will appear at the top of your search results.
You'll find the updated app in the App Store right now.