The Amish might have used this service. But they use https://ibyfax.com instead.

Many Amish communes have a dedicated outhouse building or room with a fax machine for sending/receiving fax-to-email so they can sell their wares "online".

It's fascinating how the USPS tried to adapt to the digital age with E-COM. Although it wasn't successful, it showcases the creativity and quest for innovation that has always defined this institution. Just imagine receiving your emails printed at home! A great example of how technological changes can challenge even the most traditional organizations.