I had that same debate and wasn’t sure which way to go. The truth is, each has pros and cons, but I got clarity after reading comparisons on
https://www.flash3c.com/. They explain in detail how secure fax often provides a more direct, tamper-proof transmission, while email—though encrypted—can still be vulnerable depending on how recipients handle it. For my business, secure fax turned out to be the better fit, especially when dealing with clients who expect formal proof of delivery. But for quick communication, encrypted email still has its place. It’s less about one being universally better and more about matching the tool to the context.