Idea for an e-mail provider to destroy the view images = read receipt cancer
First, the e-mail provider [algorithmically] designates 80%+ of unallocated addresses as honeypots. These honeypots will “accept” any mail sent to them, then at some point over the next [poisson process?] load all the remote images as if they’d been opened.
Once this has been running for about a year, you give existing users the option to **opt in** to pre-loading images on e-mails sent to them, advertised as having trifold benefits of (a) Confounding these neo-read-receipt abusers, (b) loading images faster when you actually read them, and (c) allowing you to keep the entirety of very old newsletters, for archival purposes. Of course, this feature itself is only rolled out to individual users in a very slow drip, and will always remain opt-in.