Tap Report Junk, then tap Delete and Report Junk.If you want to delete email from a local pst store, Mail.dll is not going to help you, but if you want to delete emails from Exchange read this post: Delete email messages using IMAP. With Mail.dll you can delete and manage email on any IMAP or POP3 server (including Exchange).Unfortunately, it is currently not possible. Conclusion: I certainly see the benefit of being able to bulk select and delete emails on the iPhone. By using IMAP instead of POP, when an email is removed through Outlook or Mail, it will be deleted from your iPhone as well.