The US Constitution mandates that Congress maintain roads and offices for the secure and timely delivery of ideas and information. This should include email in the digital age, where "roads" may be clearly interpreted as internet access and "offices" as servers.
A new domain of .usps shall be established for the voluntary adoption of consumer and business use, whereby all communications are protected by federal law and controlled by all email addresses being verified as actual physical addresses, using the format MyName.MyAddress@MyZip.usps.
Funding for this new USPS service shall come from a one-cent-per-delivery postage fee. Banks and utilities save millions vs traditional postage, and spammers relying on free delivery are blocked.
The digital age demands a digital US postal service.