Allow for custom font stacks

Hello,

I noticed the font selection for the newsletter is fairly limited. Is it possible to allow for a custom font selection? I have HTML I’ve used for my emails that has calls to custom fonts and works fairly well on most email providers (and if not, there are fallbacks). Adding an option for “Inherit” would be better than only having the options provided. However, ideally, creating an optional open-field option would be great.

Thanks,
John