I agree this would be a great feature. Being able to programmatically set the email address would really open up the effectiveness of the cart abandonment sequence. I have a good deal of customers that add products to their basket but never actually visit the checkout page. For some, I have already captured their email address via other marketing functions as they’ve browsed the site. If there was a way to set the email address programmatically those potential customers could be receiving the abandonment sequence.