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On the recordRead 3 Oct 202614 facts
Cyrus IMAP
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Cyrus IMAP
Free
Free and open source server software
Read 3 Oct 2026 · cyrusimap.org
On the record
- Antivirus and antispam
- The project says Cyrus supports antivirus and antispam toolkits.cyrusimap.org · read 3 Oct 2026
- Authentication
- Cyrus uses Cyrus SASL and supports multiple authentication options.cyrusimap.org · read 3 Oct 2026
- Download
- Cyrus is available as source tarballs or source from Git, and as packages for major distributions; distribution packages may not be up to date.cyrusimap.org · read 3 Oct 2026
- Filtering
- It supports server-side email filtering through Sieve.cyrusimap.org · read 3 Oct 2026
- Integrations
- The installation guide describes receiving mail from SMTP servers such as Sendmail, Postfix, and Exim through LMTP.cyrusimap.org · read 3 Oct 2026
- Intended users
- The project says Cyrus is used in production at universities and private enterprises.cyrusimap.org · read 3 Oct 2026
- Mail delivery
- It supports email deliverability features including SPF, DKIM, and DMARC.cyrusimap.org · read 3 Oct 2026
- Open source
- The project describes Cyrus as free and open source.cyrusimap.org · read 3 Oct 2026
- Protocols
- Cyrus supports JMAP, IMAP, POP3, CalDAV, and CardDAV.cyrusimap.org · read 3 Oct 2026
- Purpose
- Cyrus IMAP is an email, contacts, and calendar server.cyrusimap.org · read 3 Oct 2026
- Scale and reliability
- The project lists replication, robust data storage, and scalability for large installations among its features.cyrusimap.org · read 3 Oct 2026
- Security
- The feature documentation lists Kerberos, LDAP, and SQL authentication, access control, and a sealed system design.cyrusimap.org · read 3 Oct 2026
- Support
- The project points users to active mailing lists for help.cyrusimap.org · read 3 Oct 2026
