Good evening Angelo,
Thank you for writing back.
The short answer to your question is yes.
To modify the email, you will have to modify its HTML content.
If coding is not really your cup of tea, you could always hire one of our recommended customizers to do the customization for you.
Another alternative would be to perform all your desired changes on a “dummy” WordPress page in the visual editor. Once that is done, you can simply “Steal the HTML” (either from the “Text” tab or using “View source” while viewing the page preview).
Let me know if that helps.
Have a great day!
Geoff B.