The USPS is currently delivering some mailpieces electronically.

When I sign in to Informed Delivery, every month or so the USPS sends a postcard advertising their podcast (“Mailin’ It!”)

https://usps-mailin-it.simplecast.com/

This is a virtual postcard, so while I can read it in my email or on usps.com, I won’t necessarily find a paper copy delivered.

It is my understanding that commercial mailings can also use this mechanism. I receive some marketing as original JPEG quality, rather than being scanned in grayscale.