Cyrusimap.org
What is Cyrus IMAP? — Cyrus IMAP 3.12.0 documentation
Cyrus IMAP is a free, open-source server for email, contacts, and calendar management, designed for reliable, secure, and flexible communication.
Run your own secure email and calendar server
Cyrus IMAP is an open-source server platform that lets you manage email, contacts, and calendars all in one place. If you're looking to set up your own secure and reliable communication system, this site offers the software, documentation, and guides to help you get started.
With resources for both beginners and developers, you can find setup guides, feature overviews, and community support to make installation and management easier. Whether you’re running a business or just want more control over your personal email, Cyrus IMAP gives you the tools you need to host your own email and collaboration server.
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