If you're doing something right, and it's making an impact, your competitors will pick up on it. If your competitors start changing their own strategies and tactics, and if it seems like they might be doing this in response to your campaign, it's worth looking into. Identify your main competitors and analyse how their own email messaging has changed (if at all) during your campaign.
The case study email – A case study on how one of your customers uses your product. Make sure to outline what problems it solves for them (tied to the problems outlined in the first email) and what benefits it brings them (tied to the benefits outlined in the second email). Include a testimonial from a customer and a call to action to signup for your free trial/free plan in this email.
Ask for the right information upfront: Great personalization starts way before you hit the ‘send’ button. It all starts with your sign up form. Without data such as name, company and location, you will be very limited with your personalized communication. Remember to only ask for the information you need, rather than the information you want. This is one of the ways that GDPR has impacted marketing teams.