DELETED OUR EMAILS WITH NO WARNING? WTF?
You guys seriously deleted all of our emails without warning?
you changed policy that we didn't agree to, and now all of our information is gone...
there's zero support about this issue, and every suggestion below is just instantly closed with some snobby remark by an "Admin"...
where is our support? let us recover our emails and back them up ourselves WHICH we would have done, had there been some notice you were going to do this nonsense...
we all know you have them in some database still...

Here's an article regarding finding missing emails: https://help.yahoo.com/kb/mail-for-desktop/sln4538.html
You can request a mail restore here: https://help.yahoo.com/kb/SLN2552.html Once the restore is complete you would need to check your Trash folder for the recovered messages.