Thank you for reaching out to us. If you are importing a document (PDF, Word), you will need to create an image of each page that you have in your documents so that you can upload them as images. With images uploaded, you will be able to use those images as your email by inserting those images into the email body. If you are currently trying to import a custom HTML code, you do have access to a custom code editor in your account. Here is an article that will go over our custom code editor. If there are any questions regarding these options, do not hesitate to reach back out to us. In the meantime, have a wonderful rest of your day!