iCloud Mail Folder disappeared! help!
Today a folder I created years ago to organize iCloud email on my Mac was at first empty then disappeared completely. I went to iCloud and the folder was there but empty, then also disappeared while I was looking at the screen.
Time Machine showed very few emails in the folder until 3 weeks back when there are thousands, but only thru end of January 2017.
So i can't recover the contents of the folder from iCloud or TM. I have a CCC bootable backup that I'll look at later to see if maybe that has the missing emails and if so if I can figure out how to get them out of there.
Apple Chat couldn't answer the question, said they would have Mail department call me, the phone rang, but it was not an email specialist. I started explaining and realized the connection had dropped. Apple hasn't yet called back so I guess they were not interested in helping. I've had calls before where they ask the phone number and actually do call back if they have to research or connection breaks etc. (voip in use).
More background:
10.12.6 Sierra; Mail 10.3, iCloud email account, in use trouble free for years. Recently notified my 5GB storage was nearly full so Rebuilt all my Mailboxes and dragged thousands of old emails to new folders set up in On My Mac in the Mail app. The folder OMM matching the missing one in iCloud has only the mail I dragged to it thru December 2017 so I'm only trying to recover email from 2018.
So does anyone know how to access iCloud email backups that Apple might have? can't find the option in iCloud. You can restore older files, contacts etc but nothing shown for Mail.
Any ideas why TM would glitch on backing up a Mail folder? that is, I confirmed after all the dragging of older mail, that my mail from this year was there. But it's now not in TM, which shows same 3-6 emails for the last 2 weeks of backups. I put mail in that folder almost daily.
Any idea how to find the folder on a Mac in Finder? so I can poke thru the bootable backup looking for it...
MacBook Pro with Retina display, OS X Mountain Lion (10.8.5)