Well... More or less. They specifically told me that I needed a "public domain email" and that it couldn't be encrypted. I read their ToS and it wasn't written anywhere. They didn't sound like they were too tech savvy and I had to insist before I got that answer. They are most likely just a call center with a manual to follow.

What I bothered the most is that they allowed me to change the mail. The kept sending me (wanted) ads there and I could login into their site. They even kept charging my subscription. Until I tried to pay for extra tickets. That broke their system and got stuck. After that I couldn't even use the tickets I already had in my account from the subscription.

I'm not proud to admit that I finally caved and went back to my old mail for the moment. I even had to show them an ID (which at least partially defaced before) so that I could use the tickets I has already paid for