Marketing emails should be sent purposefully, only then will customers engage with them. Using a CRM will help you determine which customers need sending emails and you can automate it all. Auto-generated emails are useful to handle large pools of customers effectively. The emails should be tailored with certain objectives in mind. For example, reminding customers to complete their purchase, to download an e-book, to subscribe to a newsletter, or to obtain a discount. You can choose what works best according to your business and plan accordingly.