Stage 2 The First Section
The first section goes hand in hand with the subject line, now that you have their attention you need to speak directly to the customer and address either their pain point or the benefit that they can get from what it is you are selling.
The reason for this is that you have now painted a picture or a scenario in the customer's mind of the problem that they have and reminded them of the need to fix it.
If you start your first sentence with what it is that you have, subconsciously they will switch off and probably delete the email.
Then follow with a short sentence or two to let the customer know that you have that solution to the problem, you can say something like and that is why we have created the super product 2000.
Or if it is a long established product that the customer already knows about if you could say, and for a very limited time we have a special offer the super product 2000.