Sure, maybe a lot of garbage emails come from gmail too. I very much doubt there’s any kind of ulterior motive (seriously? what ulterior motive would a website hosting company have in cutting off a segment of their potential clients?) and that the action resulted from legitimate pain and issues the company was feeling. But Netlify is a business and has every right to make its own business decisions around whatever it chooses.

Banning an entire domain of public emails is not a small thing. Netlify not supporting email addresses does feel like a wide action. I believe given all the official justification from Netlify’s (official) stance on the policy, but as a non-Netlify employee that’s not beholden to the ‘official policy’ - I get it. I wish I had better news for you! If you have follow up q’s, I’d be happy to try and answer them. I don’t have information on hand at this second as to which email providers are on our list of frequently abused services, so you might find that one of those providers you listed does work, but unfortunately protonmail does not and likely will not be unbanned as the security risk is simply too great.

We understand that blocking an entire email provider is quite drastic, but it was the only way to mitigate the impact on our service.

The extent was so severe that our paying customers, search engine results, and legitimate business side of things were being negatively impacted. We found that, when we allow protonmail email addresses on our system, we experience an extreme uptick in accounts with spam, fraudulent activity, phishing, illegal (by US law) pornography, dmca violations, and things of that nature. Unfortunately, we had to restrict access to our service for protonmail (and a few other email providers) some time ago (more than two years - it is not a recent change)

Change protonmail address