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All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
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Free alternative to Microsoft Exchange
stalwart is a free, open-source alternative to Microsoft Exchange. Here's why:
- 📧 Email server
- 🚀 High-performance
- 🛡️ Secure protocols
- 🗓️ Calendar integration
- 📇 Contact sync
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