Email newsletters require a different style than print and should be short, scanable, and drive readers to a website. An effective strategy includes determining the audience, goals for that audience, and frequency of emails. Successful newsletters, like Obama's, are targeted, concise and call readers to a specific action, while less effective ones like McCain's are too long, broad and cluttered. Newsletters must comply with CAN-SPAM regulations, use opt-in subscriptions, and track analytics to measure effectiveness. High-quality, valuable content is also critical to engaging readers.