I have a Nexus 4 running Kitkat 4.4.2 and everything was good until a few days ago. I have a few accounts on the phone but the one I'm trying to fix is the corporate email - I had a stuck message (not in my Outlook inbox but in my phone inbox) and tried deleting & filing in a different folder but nothing worked. With iphones and newer Blackberry devices, you can simply remove the offending account and then add it again which usually fixes glitches like this. After removing the corporate email account from the accounts list and having it hang when trying to recreate it, I ended up doing some reading which led me to the Security section to remove the corporate email from there. Now I am able to create a corporate email account but my only options are POP or IMAP which won't work.