These were some of the email design proposals I submitted to my client. They needed a design for domains that are about to expire, and for successful registration. 

For Domain Expiry proposals, I asked what they wanted message do they want to convey to the user. I made sure to highlight the important / critical messages by applying visual hierarchy and emphasis on important texts such as Domain Name and Expiry, while keeping the message short and concise since users don't really read - they scan.