Email templates

I'm looking for assistance with creating email templates to help with our sales and marketing efforts. These templates should be optimized for mobile devices and should not be customizable for different audiences. I'm looking for someone who will be able to design attractive and comprehensive email templates that can reach our existing and potential customers. The templates should suit our brand and represent us in the best possible light. We need templates that are functional and compelling, so they will encourage engagement with our users. Ideally, these mail templates will enhance our sales and marketing efficiency and will be tracked.