This is strange.. I'm sure I fiddled somewhere and "broke it"
This was working just fine yesterday.
Mail gets delivered to the "inbox" but after reading, it's gone. I'm not deleting it (yet), simply just reading it.
I do have several server side rules that move mail to different folders. My "message forwarding options" has all of these "destination" folders selected.
Hide Files = Yes
Hide Sent = Yes
Keep Messages = 3 Months
Delete on: Mailbox & Handheld (I'm not deleting them though)
Mail that is delivered directly to my Inbox works as it should.
Storm OS 18.104.22.168
Fresh reboot so plenty of memory free