Customer has found that the "Sign up notification for buyer" template allows HTML but none of the other templates do.

Customer has advised that they are unable to create rich email content that matches their competitors using liquid and want to be able to use raw HTML as well.

It looks like they want to be able to use image heavy Table/DIV+CSS layouts
As you may be aware, we currently employ a rather simplistic approach to our email notifications, which, unfortunately, falls short in comparison to the professional standards set by our competitors. While we effectively convey essential information to our customers, we lack the aesthetic appeal and functionality of modern email designs.

Given the competitive landscape, it's imperative that we enhance our email templates to reflect a more polished and professional image. This not only improves our brand perception but also enhances the overall user experience for our customers.

I am aware that we already utilize Liquid for incorporating dynamic customer data into our emails, which is commendable. However, I believe it's time we take a step further and introduce UI design elements to our email templates. By doing so, we can ensure consistency across all our communications while delivering visually appealing and user-friendly emails.

I kindly request your support in extending this feature to all our email templates, similar to the design and functionality of our signup notification emails. This enhancement will undoubtedly elevate our customer communication efforts and align us more closely with industry standards.