Q: I need to access files in DropBox to fax from my iPad. Which Internet fax services allow me to do that?
A: What we love most about Internet fax is its ease and accessibility — the ability to send faxes anytime, anywhere. The best mobile application for Internet faxing we’ve seen is from MetroFax, which features native support for iPad and Android tablets, and of course for smartphones as well. You can easily send faxes from your device or files in the cloud. And yes, Dropbox, and even SugarSync, are supported (pictured below). More features of the MetroFax mobile app include attachment source preference settings, support for mobile cover page defaults, fax image preview, Apple AirPrint support (iOS devices only), MetroFax option on Send menus (Android only), support for HP ePrint (Android only) and push notifications via Google Cloud to device (Android only).
With other top services like MyFax, you can send and receive faxes through your email. For your purposes and your use of DropBox however, MetroFax is the way to go. Read our full review of MetroFax and see how it compares in our Internet fax comparison chart.