Check the code in HTML email template and repair any bad code.

I have had an email template designed in the old fashioned way with hand coded and the images stored on a content delivery network service. I have discovered that there are issues with it that gmail are picking up on causing many internal bounces. I have run it through a tool that finds incorrect HTML, missing tags, etc, etc.

I cannot get in touch with the person who designed it so I would like someone to look at it a make correct any fault they find after doing their own checks.

Attached is some images that show some of the issues.