That's a good point. Right now if I send something out, even if the company I submitted it to deletes it from their servers, doesn't mean other users will delete copies of the data I want to have deleted. Only the party I submitted it to will have to delete it.
Just take a screenshot of a tweet or a LinkedIn profile or whatever someone posts here in the Fediverse, anyone can capture a copy of it.
Very good advice.
I'd like to add that in those 84 new messages there might be a clue to why there are 84 new messages. Better get to it!