MS Office Outlook 2011 Hangs since upgrading to El Capitan 10.11.X

My MS Outlook 2011 software still hangs when syncing with servers.  My Inbox has over 30K unread e-mails now because of a timing issue between my trashcan and my inbox. When I 'delete' an e-mail in Outlook, it doesn't delete it, but moves it to the trashcan. When my folders sync with gmail (for example) the server sees that I don't have an e-mail in my inbox, so it sends me another copy - which I have to delete again.  My trashcan can't keep up, and the whole thing hangs.