Problem: You have setup imap email on your iPhone/iPad and cannot delete emails. You see the error “Unable to move message – The message could not be moved to the mailbox Trash”. Fix: – Go into settings -> Mail, contacts, calendar – Go into your email account – Scroll down to the bottom and click advanced – Tap on IMAP Path Prefix – Enter INBOX in capitals. – Click on accounts on the top left and also click done and then done again. (If this step is not done it will not work) Did this help you? I had a client the other day which this fixed her issue.