Just wanted to highlight there is defect in AOL mail app, which is causing unauthorised deletion of emails and its easily reproducible:

Steps to reproduce:

1. Take any inbox email use Reply option and edit some message then save it in draft
2. Now delete this newly created draft email from Draft email folder
3. It will delete Draft as well as all the emails from Inbox or sent email which were part of same email trail (thread)
4. Those automatically deleted email from Inbox don't show up in Trash /Deleted folder as well