To create a template with custom HTML coding, you will need to create a template in either Advanced Editor Mode or No Editor Mode.
 
You can create a new template that is in No Editor Mode by selecting the blank template that is available on the Layouts step:
  1. Click Communications in the menu bar
  2. Select a category
  3. Click New Document or Email Template
  4. Name the template and choose next
  5. Create a new template that is in No Editor Mode by selecting the blank template that is available on the Layouts step. You will receive a message asking if you are sure you want to proceed into Advanced Editor Mode, click Yes to do so.
  6. On the next page, you will see an HMTL option in the toolbar across the top of the template. Click this, and you will bring up the HTML Source Editor where you can paste in your custom HMTL coding
  7. Once you have copied in the code, you can save the template, and then use that template to send out your mass email.