I suggest names that don't have limited country/cultural references if the intent is to make this a global success. Some other suggestions:

-SecMail (Secure Email)

-PrivMail (private/privacy email)

-FMail (freedom email)

-NetMail (New Internet standard email)

And thank you for taking this on, it is seriously needed. And please, no reliance on CA certs, chances are the NSA has compromised at least some of those.