# Contents

- [Introduction](/contents/introduction.md)
- [Newsletter](/contents/newsletter.md)
- [Recipient lists](/contents/newsletter/recipient-lists.md)
- [Insights](/contents/newsletter/insights.md)
- [Letter sending](/contents/letter-sending.md)
- [Setup onlinebrief24 letter connection](/contents/letter-sending/setup-onlinebrief24-letter-connection.md)
- [Setup letterxpress letter connection](/contents/letter-sending/setup-letterxpress-letter-connection.md)
- [Setup pingen letter connection](/contents/letter-sending/setup-pingen-letter-connection.md)