The structure of your email message should follow a logical and coherent order that helps your reader understand your message and follow your call to action. A common structure for email messages is the AIDA model, which stands for Attention, Interest, Desire, and Action. This means that you should start with a catchy and relevant opening that grabs your reader's attention, then provide some information that sparks their interest and shows them the benefits of your message, then create a desire for your reader to take action, and finally, provide a clear and specific action that you want your reader to take. For example, if you are writing to promote a new product, you could start with a question or a statistic that relates to your reader's problem, then explain how your product solves that problem and what features and benefits it offers, then create a sense of urgency or scarcity that motivates your reader to act, and finally, provide a link or a button that leads them to your landing page or order form.