Retention Email, as the name suggests, is to retain the existing customers. These Emails are sent to the existing customers for the purpose of keeping them. However, it is being difficult for companies to properly use the technique and retain more customers. They are mainly focussed to acquiring new customers and are not able to focus on the existing ones’ satisfaction and engagement. So, it is better if they are consistent and communicate with the existing customers to give them a personalized experience and help them be a part of the brand for a longer time.