It is very common for companies to have a very defined style guide, with very specific fonts that are not always the default fonts available.

Currently the solution allows you to include custom letters by doing it directly from the HTML Tab, the reality is that users do not always have a sufficient technical background to do so and when trying to do so they can generate problems in HTML and of course bad experiences with the solution.

I suggest the creation of a custom web fonts administration module, in which fonts can be included/activated/deactivated, if possible, it should be available for Email and web Forms.