• Avoid linking recovery emails or phone numbers that can directly tie back to personal identities or primary business activities.
• Consider using secondary, disposable emails or virtual phone numbers that offer an additional layer of anonymity.
• Use a good VPN service to hide your IP address whenever possible. (Failure to do this is what compromised a Proton Mail user in France who was arrested after after police obtained IP logs.)
• Consider purchasing services using an anonymous payment method.
• Stay informed about the legal obligations and policies of communication service providers, especially regarding their compliance with international law enforcement requests.

There is a difference between security/privacy, and anonymity. As we wrote in our public threat model(new window) (published back in 2014), “The Internet is generally not anonymous, and if you are breaking Swiss law, a law-abiding company such as Proton Mail can be legally compelled to log your IP address.” This cannot be changed due to how the internet works. However, we understand this is concerning for individuals with certain threat models, which is why since 2017, we also provide an onion site for anonymous access (we are one of the only email providers that supports this).