The issue I’m seeing with any free plans of email providers is that they either require an identifying verification, or don’t allow the email to be used for services.
tutamail, for example, states that the free plan is not to be used to signup for services.
protonmail requires verification by email ‘to prove you are human’.
Thank you
What?
I’m kinda surprised that any email would ask you to have a previous email to be able to create account… Proton surely didn’t for me. The only way they could require identifying verification would be by demanding a cellphone number, because you can lie about everything else, hell, if you have an online service for that you can lie about that being your phone number as well.