Protonmail blocks anonymous signup - alternatives?

Until recently protonmail was one of the few remaining webmails that didn’t require a phone number or other personal info for signup, but now they ask for an email address and block disposable domains so they are basically a joke of what they used to be. What options are left for when you need a persistent (not disposable) anonymous and free email address that you can use normally for sending emails and that isn’t blocked everywhere?