[Cthulhu_]

You say /s, but a government issued and USPS operated e-mail service may be very profitable. In the Netherlands we have a government message system where the tax office, local counties, water companies, etc can send you 'official' messages. Thing is though, each message costs €0.25 to send. I think this is ridiculously expensive for a glorified email, but I suppose they have a lot of certifications and audits and the like. I hope, anyway.

Anyway, email itself is broken, but this system works because if it costs money to send a message, it discourages any spambot and/or misuse.

[Symbiote]

€0.25 is much less than the cost of printing and posting a letter, and presumably this service comes with proof of delivery.

(There's a similar system in Denmark.)