Cyrus IMAP
The facts below are what the maker publishes about Cyrus IMAP, checked and dated. Our editors have not written about it yet.
Plans and prices
From Cyrus IMAP's own pricing page, checked 3 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Cyrus IMAP | Free | Free and open source server software |
The facts
Each one read from Cyrus IMAP's own pages, with the date it was checked.
What it does
- Antivirus and antispam
- The project says Cyrus supports antivirus and antispam toolkits.checked 3 Oct 2026
- Authentication
- Cyrus uses Cyrus SASL and supports multiple authentication options.checked 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.checked 3 Oct 2026
- Filtering
- It supports server-side email filtering through Sieve.checked 3 Oct 2026
- Integrations
- The installation guide describes receiving mail from SMTP servers such as Sendmail, Postfix, and Exim through LMTP.checked 3 Oct 2026
- Intended users
- The project says Cyrus is used in production at universities and private enterprises.checked 3 Oct 2026
- Mail delivery
- It supports email deliverability features including SPF, DKIM, and DMARC.checked 3 Oct 2026
- Open source
- The project describes Cyrus as free and open source.checked 3 Oct 2026
- Protocols
- Cyrus supports JMAP, IMAP, POP3, CalDAV, and CardDAV.checked 3 Oct 2026
- Purpose
- Cyrus IMAP is an email, contacts, and calendar server.checked 3 Oct 2026
- Scale and reliability
- The project lists replication, robust data storage, and scalability for large installations among its features.checked 3 Oct 2026
- Security
- The feature documentation lists Kerberos, LDAP, and SQL authentication, access control, and a sealed system design.checked 3 Oct 2026
- Support
- The project points users to active mailing lists for help.checked 3 Oct 2026
The company
- Founded
- 1993checked 28 Sep 2026
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