eprint submissions not showing up in hpconnected print queue

I've used eprint for a year or more; suddenly it's not working and the files I submit by email are not even showing up in the hpconnected print queue, under collections.

I have tried several types of files tonight - short emails, word documents, etc, in case a virus was somehow attached. I've submitted from a mobile device and a desktop. 

The print queue remains empty. 

I have tried from 2 email addresses, both of which I've confirmed tonight are  authorized email addresses. 

Printer: HP Photosmart C410a

-frustrated.

Thanks!