You are welcome to use other email services to login to our service. However, we could not and cannot tolerate the rampant and automated abuse that protonmail’s policies permitted. We also block other domains with this problem, but protonmail was the number one offender, for several years, and so we blocked it completely and explicitly. This is not theoretical, it is a situation which has occurred, and when it did, it impacted every one of our customers - which is not an acceptable situation for a business whose main feature is running a CDN that is expected to be available 24x7x365.Īs a result of these situations, we made the painful decision to block protonmail, to save us from wasting thousands more dollars and cause more service degradations on our service, and more damage to the internet at large via attackers who leverage protonmail+netlify to spam and phish. You can imagine it is not very pleasant to be put in this position, and it is also extremely problematic for our service as our network providers sometimes shut down our CDN when abuse is reported to them. It was also our job to apologize to the hundreds of people who reported being attacked from our service by these bad actors. These accounts were used to attack other users on other services: phishing sites, spamming sites, etc, as well as soaking up thousands of real dollars worth of our bandwidth and staff time. Thousands of fraudulent accounts have been created on our service over the years from accounts (and it has been our Support team’s job to investigate each of these). Here’s why: Protonmail’s service seems to be particularly prone to abuse.

This block was put in intentionally at our Support team’s request. We block addresses from signing up on our service.

I have one, but I do not use it with Netlify.

Hi and true, we do not support Protonmail addresses.

Proton mail account