This is the worst email service. I migrated my personal email to proton mail and I was initially thinking of getting the paid version. After 2 days, my account was suspended. Apparently, their anti-abuse flagged my account. I tried to write to support but they are either non-responsive or they do not read my messages and just copy and paste default questions and basic answers about not able to overturn the account suspension. My support request is *******.
I read their entire terms of service. I did not violate any rules. This is my one and only account with Proton mail. I did not spam anyone. I did not sent any junk emails or bulk emails. In those 2 days, I already had correspondence that are sensitive in nature as well as time sensitive. Since they suspended my account, I can't access anything so all my email conversations are dead...
Please make sure to back up all data and contacts because you can get suspended at any time. In fact, just don't even migrate your email over to them.