Even if you could, someone could just create an email and attach the file to it... ... View more

According to the Adobe Help document below, you must license any fonts by purchasing them from a font vendor: Can I use the fonts with InDesign Server? No. The font licensing isn't compatible with InDesign Server. You will need to purchase the appropriate font license for any fonts that you want to use in InDesign Server from the font foundry directly or the foundry's authorized reseller."   https://helpx.adobe.com/fonts/using/font-licensing.html   ... View more