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Top 7 open-source products relevant to Self-hosted Email and Email Clients

  1. Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

    Open Source

    /mail-in-a-box-alternatives

  2. Web-based IMAP email client.

    Open Source

    /roundcube-alternatives

  3. A fully fledged, free email server solution, an open source project (GPL v2).

    Open Source

    /iredmail-alternatives

  4. SOGo is groupware server with a focus on scalability and open standards.

    Open Source

    /sogo-alternatives

  5. Cal and CardDAV server.

    Open Source

    /baikal-alternatives

  6. The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.

    Open Source

    /radicale-alternatives
  7. X

    Lightweight CalDAV/CardDAV server on top of Git.

    Open Source

    /xandikos-alternatives

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