Can I fax out-of-network claim forms from Gmail to my insurance company?

Health insurance companies love demanding physical faxes, but setting up a traditional landline for a single claim is totally unnecessary. When I had to file my own out-of-network medical expenses a few months ago, I read through https://how-to-fax-from-gmail.com/ to find a quick work-from-home method. Out of all the solutions proposed in the article, I chose Municorn Fax App for myself. I uploaded my scanned medical bills, sent the email directly through the gateway over my home Wi-Fi, and received a confirmed transmission log right back in my Gmail inbox to file away.