Add a blacklist option in message view

I get spam emails to my support inboxes on a semi-regular basis. It would be great to have a simple way (but with a confirmation) to add a sender to a "blacklist" and delete the email I'm viewing.

I invision a single blacklist that simply hides emails from hitting my Fluent Support inboxes (all of them) and deletes the incoming emails so they don't take up space in my database.

I don't need to use existing spam lists or anything, just a way to mark incoming emails as junk.