The document provides 7 steps to build and maintain lasting customer relationships through email marketing: 1) Define goals and metrics, 2) Focus on understanding your audience, 3) Send targeted content relevant to different audience segments, 4) Consider when and how to send emails, 5) Use the right technology, 6) Enrich customer data through integrations, 7) Measure performance and iterate based on results. Examples from companies like Chandon, HuffPost, and Flight Centre are given that demonstrate how applying these steps has led to increased customer engagement, email opens, and click-through rates.