05-20-2013 04:21 AM
Welcome to the BlackBerry Support Community Forums.
Thanks for the question.
Follow the steps in this blog post to mark prior read or delete prior on the BlackBerry Z10 smartphone: http://helpblog.blackberry.com/2013/02/mark-read-b
Please note: Deleting messages from the BlackBerry Z10 smartphone may/will remove the message from your mail server and Microsoft Outlook.
Let me know if you have any more questions.
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Click Accept as Solution for posts that have solved your issue(s)!