Ok I should’ve mentioned that not all of the errors shown are relevant for you, since you’re not building a website but only an email template. I have absolutely no experience with those, but the errors that need fixing are
- wrap the whole code in a
<td> elements need to be children of tables
- this is wrong syntax:
<td class="rightColumnContent" style="; "max-width: 280px;">, the first semicolon in the style attribute followed by a double quote causes errors
<h7> doesn’t exist in HTML, maybe you meant a
As mentioned, I can only google email templates (responsive or not), but generally, it depends on how much time you have. If you only need this one template to be responsive, I’m sure you can find a template if you google specifically for responsiveness, but if you really want to learn how to write responsive CSS, the fCC curriculum linked in the upper left corner has a lot of lessons.