This document provides an overview of building an email marketing practice. It begins with email marketing statistics showing its growth and potential compared to other digital marketing channels. It then discusses common challenges like deliverability, list quality, and sender reputation that marketers must address. The rest of the document outlines best practices and strategies for email marketing such as segmentation, testing, content design, lifecycle marketing, and integrating email into multi-channel marketing programs. It emphasizes the importance of measurement, resources, and gaining expertise to build a successful email practice.