As a matter of course, you can unsend email on your iPhone, iPad, or iPod touch. What’s more, if you have mistakenly sent a private message to the wrong recipient or wish to recall an email that was already sent out to the other person(s), there is a way for doing so as well. In case you have already sent out a message or email that caused a lot of problems, you can also recall it. Nevertheless, there are a couple of factors to keep in mind:
Recalling emails on your iOS device is very easy. Once you start the Mail app and view the contents of an email account – for instance, your iCloud account – tap and hold the email you want to recall, and it will be highlighted. From there, a bunch of options appears on your screen including Mark as Unread or Trash among others. In order to be able to unsend messages, choose the More option from this list and select Cancel Send from the drop-down menu that is displayed. Confirm this action by tapping on ‘Cancel Sending’ and you should be good to go. Bear in mind that once a message is successfully recalled, it changes from Sent to Inbox.
Although everything seems great at first glance, there are a couple of reasons why you might want to think twice before recalling or unsending an email. For instance, while some people might comment that it is bad etiquette to unsend an email after someone has already opened and read it, the even bigger problem lies elsewhere. Namely, although you can recall emails on your iOS device such as your iPhone or iPad, this does not work for emails sent using iCloud by other users. Thus if somebody has already received and opened an email you sent, you cannot recall it.
Conclusion As a result, you can only stop emails from being sent by recalling them before the other user has seen them. However, this does not apply to messages that were sent using iCloud as such options are unavailable for this particular service. Nevertheless though, if the person receiving the info has opened the email already, you cannot unsend it.