How to Send an Email Preview
On the Edit Post screen, you'll see a box named Postmatic Delivery.
You can send yourself a preview of your email by clicking on the Send me a preview email button. This is a great way to make sure that all of your formatting shows up correctly in the email. After you click on the button, a brief message will appear to confirm that the preview email was sent.
Within moments, you will receive your preview email. This shows exactly how your post will look to your users. Feel free to send yourself as many previews as you need.
Tip: Press the Save Draft button prior to sending yourself a preview in order to make sure you get a copy of your latest changes.