If you don't receive an email when registering on Crazy as a left-handed computer when joining? From what I can establish nobody yet assures TLS 1.3 in and out but us. Also, check the junk folder as some email servers classify email incorrectly.
The likely reason is your email server does not support TLS 1.2/1.3 encryption and traffic to your email server can be intercepted which we don't permit.
EMAIL: WE ENFORCE ENCRYPTION FOR ALL TRAFFIC (MTA STS)
Moderator: embleton