With that said, what happens if you get the wrong template design? Here are the problems you will be encountering with an inappropriate design:
The email messages when delivered to their recipients are not correctly displayed. This could be due to a lot of reasons. It could be that the email provider (yahoo, gmail, outlook, etc) is not able to display it because of some factors. Or the code of the email design isn't just polished enough.
The email messages do not display at all. They get delivered but the message section is blank. Usually in cases like this, the problem is on the email template design itself.