Will this mail protocol essentially become the transaction gateway protocol as a cross-chain and even intra-chain communication layer? This way chains can check their "inbox" and recv, send things to other chains analogous to sending mail to people. I've read around that this was the way we were moving forward? Atleast it would be helpful for a layman to understand how communication in the blockchain amongst nodes is happening... it would greatly increase new user acceptance of the technology since they would begin to understand how it works.
The part that intrigues me is "the mail server (or an eavesdropper) does not know whether the mail is an email or transaction notification. The only information given by an encrypted message is the recipient address." This is what led me to write this question.
This would open up possibilities of hooking up to mail services today to enable "mail 2.0" services in which you would not only be able to send messages, but full transaction notifications like sendng/recvign/trading assets on the blockchain through a web service. If it's an email does the node relay it across an actual mail server somewhere to send a conventional "email" (assuming they set the email address as the recipient, maybe this could be possible to bridge mail 1.0 and mail 2.0?
I could envision your "mail box" or google mail box service to be configured to access you're personal bts wallet (obviously it is secured) and thus enabling these features and your web wallet essentially becomes a mail in/out box for communication or basic transaction purposes.