The Optimize Responsive II Email 1 HubSpot template is ideal for sending any business message through the HubSpot email CSS. This COS email has a very basic design, while using all of the HubSpot email design best practices. The simple icons add a visual element to a company message and the call to actions are placed strategically to enhance click through rates. This HubSpot template is so versatile that it should be a staple for all businesses using HubSpot email CSS.