HTML custom code for emails refers to using HTML and inline CSS to design and format email content ensuring compatibility across different email platforms (like Gmail, Outlook, Yahoo Mail, etc.).

The purpose of HTML custom code for emails is to create visually appealing, responsive, and consistent email content that works well across different email clients and devices.

While this may seem good to have, our app doesn't support custom HTML coding at the moment for the emails being used in this app.

It is on our roadmap for addition to the apps but we do not yet have a timeline for this.