Need HTML email to be coded properly to render correctly.

We need our email's html to be fixed to render correctly. We will submit a HTML file you can preview in your browser that will render the email exactly the way we want it to look in every email client (outlook, yahoo, gmail, mobile devices, etc) you'll need to take our HTML code and tweak it to make sure it renders correctly accross all email clients, devices, and browsers. We are also pulling images in from our sever into the email.