The ideal design is to follow and maintain an AIDA model as a structure.
1. Contain a subject line, short and concise. Since many people open the email from their mobile device, then we must generate interest for the client to enter our email.
2. Directed personally to the contact, that is humanized, that is, that it goes specifically with the name of the client and not general.
3. The text must attract the interest of the client. In this part we must have a call to action.
4. The content and information must be direct and to the point of what is meant. The more specific we are in the email, the easier it is for the reader.