There is a big problem with Protonmail. Emails are being intercepted by a scammer who is impersonating our vendors and giving false payment information. Use a different email.
If you receive unknown Tutanota emails in your Proton inbox don't even open them. I am receiving them myself and they are obvious phishing attempts. This is affecting several vendors and I will be contacting them tomorrow and telling them to get new emails.
So far this problem is only with vendors and customers using Protonmail.