I received an email about threads and Mastadon a bit ago. The thing is I deleted my Mastadon account a hot minute after I created it. The email has no way to unsubscribe from it 
I would like to be comforted that I’m overthinking this. My Mastadon account was a couple of years ago in both creation and deletion. It’s incredibly disconcerting.
Just a reminder that “Mastodon” is the software, not the specific service provider. Mastodon.sdf.org is different from, say, Mastodon.social even though they run the same software.
If you haven’t already, you should contact the admin for that instance with your concerns. The contact the site lists is mastodon@mastodon.sdf.org
Thank you, I appreciate the pointers a huge ammount