Great. When that is done, then do email with is frankly a far more retractable problem in general (and a field where there is almost zero innovation or improvement, thanks to Microsoft (Exchange/Outlook/Outlook.com), Apple (Mail), and Google (Gmail)).
Of the communication that's nominally protected by TLS, a lot of it can probably be trivially broken by an active MITM attack that either (1) prevents a connection from being upgraded to TLS, in which case it typically remains plaintext (see STARTTLS), or (2) establishes the connection under a self-signed certificate, which will suffice since many email systems do not perform certificate path validation.
Mm you mean RFC 822 - well thats the down side of internet standards x.400 had a lot of nice security features but the cheap and cheerful SMTP email standards won that war a long time ago.
I used to do X.400 and x.500 for a Large Telco back in the Day.
It's a trade off between ease of use and cost - and is a tech example of Gresham's Law
One thing that amazes me is that I get a huge volume of spam emails that claim to be from financial institutions. I use gmail for two reasons: (i) deliverability to mailing lists I need to be on and (2) other mail programs don't filter that junk out.
In 2015 it should be impossible to send a fake email from chase.com
But, unfortunately, even mail from a properly configured mail server on properly protected domain will still end up in gmail users' spam boxes by default. Domain and server rep systems are a bear to work with.
