alt Hacker NewsCharles Schwab has something very similar. They keep unenrolling me from their paperless thing and then send me a letter every month telling me they unenrolled me because emails aren't being delivered.
But I get their emails just fine. It's their tracking that (intentionally) isn't working.
Capital One is the same. I eventually stopped caring; I know these paper mailings are costing them money. Maybe they'll get the point someday.