Recently I was missing some very old important emails from my "Inbox" folder, I thought it was me that accidentally deleted them (which i never really bought) but then i emailed my self a test email and named it "auto delete test" and put the date on the subject, now surely almost a month later that email has been auto moved with a bunch of other to the "trash bin" WHY!!?

I have no other email client using this account that could explained this issue, never been "hacked".

Please help a loyal 10 year user or lose me forever.