Not sure about this forum but i never heard of any forum permitting a member to change their username. Maybe since the previous username will be associated with the new new username & might be confusing for the members.
When i try to access the charts i receive this error..."
Forbidden
You don't have permission to access /encrypted-email-service-providers/ on this server.
Server unable to read htaccess file, denying access to be safe"
Tutanota now offers light & dark theme. Click "more">"switch theme color" Tutanota
Meet the Secure Mail Client of the Future: We Invite You All to Join Tutanota's Public Beta
According to Proton, Scrypt, Tutanota, Mailfence, LuxSci the mail is E2EE.
Regarding Hushmail, it states OpenPGP encryption. Not sure if this means E2EE.
Some use the word encryption, don't know if this is the same as E2EE.
Not a lawyer but see no reason it's not legit since it's just a dating site. But it does seem odd, have you asked them why they will not use their computer?
I also had an issue with safe-mail, at first i couldn't even open it, got an error.
When i tried to open my safe-mail desktop shortcut i got an error.
But is working now.