You know whether you’re going to love or hate a book from the first line on the first page.
It sets the tone for the whole experience of the narrative. You only need to look at the classics of literature to find evidence of the fact that the way you start a novel is just as, if not more so, important than the way you end it.
So why not apply this principle to your emails?
This is why it is important to know what a preheader is, why you should include it and how you can create one in your GraphicMail email editor.