Their email marketing strategy and plan was to optimise their email subject lines because this was the first place that their customers would engage with. To do this, they used an AI generating subject line tool called Phrasee. There are plenty of increasingly sophisticated AIs out there which can do this kind of thing. Phrasee worked for Dominos because it capitalises upon being specific to brand voice, and is optimised to drive action.
But if people don’t believe those reasons, they don’t buy either. As long as you seem like a friend who’s trying to help them, people are likely to believe that you’re sincere and that buying from you is a good decision. That’s one of the main reasons email marketing can work so well; it’s relatively easy to come off as a friend. Especially the other two email marketing strategies are good for making people see your good intentions. That said, if your offers don’t make people think you’re genuinely trying to help them, something is wrong.