Add support for custom fonts in PMO. Users should be provided with an interface for uploading custom font files. Uploaded font files would then be sourced on the user's server so that they could be referenced within their email templates.
This would allow the customer to follow brand-specific font guidelines when building email templates. This would also solve the current problem that we face where custom fonts will only work on devices that have that font installed. If the font is sourced, it should theoretically work on any device.
Internally submitted idea