Look. Outlook, Yahoo, ICloud, even Gmail provides temp mails solutions, but nobody complains or blocks them.

Also you can use something like this that will create disposable Gmail every time. So blocking Proton is totally useless

Unfortunately? This is true. That’s why I asked help from community!

We fighted it out from 7c filter. Now only this and this lasts. Thank you for kind words. Only community can change this bad practice!