Jetpack Newsletter
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Jetpack Newsletter is Jetpack's free email feature built directly into WordPress sites with the Jetpack plugin active. It lets visitors subscribe to email notifications of new posts and allows site owners to send newsletters from the WordPress dashboard. There's no cost and no external account requirement, just WordPress and Jetpack.
It's ideal for beginners or sites with modest email needs because it's genuinely free and requires zero setup beyond enabling the feature. You don't get advanced automation or detailed analytics, but for simple post notifications and occasional newsletters, Jetpack removes the friction of connecting external services.