Cyrus IMAP
Cyrus IMAP serves as a robust email, contacts, and calendar server, renowned for its speed and security. It supports CardDAV and CalDAV, along with extensive authenticati... Cyrus IMAP serves as a robust email, contacts, and calendar server, renowned for its speed and security. It supports CardDAV and CalDAV, along with extensive authentication options through Cyrus SASL. Ideal for large installations, it features efficient data storage, flexible filtering via Sieve, and deliverability handling with SPF, DKIM, and DMARC.
Top Cyrus IMAP Alternatives
mailcow
mailcow is a user-friendly, open-source groupware and email suite built on Docker, leveraging established components for a seamless email server...
Why mailcow as a Cyrus IMAP alternative?
- Dockerized installation, where Cyrus IMAP offers building and installing yourself
- Integrates Rspamd for spam filtering
- Open-source groupware system, unlike Cyrus IMAP's email, contacts and calendar server
- Supports external authentication sources
iRedMail
Deploying a full-featured, open-source mail server takes mere minutes with this solution, which integrates essential components and best practices. Users...
Why iRedMail as a Cyrus IMAP alternative?
- Names SpamAssassin and ClamAV for antispam
- Offers professional technical support rather than Cyrus IMAP's mailing lists
- Adds ActiveSync via SOGo, compared with Cyrus IMAP's CalDAV and CardDAV
Mailu
Mailu offers a robust mail server solution through a collection of Docker images, emphasizing simplicity and user-centric features. It supports...
Why Mailu as a Cyrus IMAP alternative?
- Deploys as Docker images versus Cyrus IMAP's package or source install
- Skips unrelated groupware, unlike Cyrus IMAP's contacts and calendar server
- Includes built-in anti-virus and anti-spam
Poste.io
Poste.io allows users to set up a fully functional mail server within five minutes, simplifying the installation process through automation....
Why Poste.io as a Cyrus IMAP alternative?
- Ships as one Docker container, rather than Cyrus IMAP's build-yourself install
- Bundles ClamAV and Rspamd
- Limits its free edition to personal use, compared with Cyrus IMAP
Modoboa
Modoboa empowers users to establish their own secure email servers in under 10 minutes, eliminating reliance on conventional providers. It...
Why Modoboa as a Cyrus IMAP alternative?
- Modoboa's installer handles most setup in minutes, rather than Cyrus IMAP's steps
- Sells installation and maintenance help
Citadel
Citadel is an innovative platform that enables seamless email, collaboration, groupware, and content management tailored for both local hardware and...
Zentyal
Zentyal serves as an effective alternative to Windows Server®, seamlessly integrating with Microsoft Active Directory® without disrupting users. It provides...
OpenSMTPD
OpenSMTPD 7.6, released on October 13, 2024, is a robust, free implementation of the server-side SMTP protocol, adhering to RFC...
Dovecot Pro
Dovecot Pro stands out as a premier email backend, chosen by leading Telcos, ISPs, and Hosters. Its innovative Palomar architecture...
GMS (Gordano Messaging Suite)
For growing businesses seeking reliable email solutions, GMS offers a straightforward approach without the confusion of jargon. With decades of...
Courier
The Courier mail transfer agent (MTA) serves as an integrated mail and groupware server, supporting ESMTP, IMAP, POP3, and more...
KumoMTA
Architected for enterprise performance, KumoMTA efficiently handles millions of messages per hour on a single server, with seamless horizontal scaling...
Mercury Mail Transport System
The Mercury Mail Transport System functions as an efficient mail server, managing incoming and outgoing emails for users within a...
Eudora Internet Mail Server
Eudora Internet Mail Server (EIMS) has received a rare update after 13 years, enabling support for newer hardware and Mac...
Horde
The latest release of Horde Groupware enhances usability with a fresh design and improved mobile support, allowing seamless access to...
Company Information
- Company: The Cyrus Team
Top Cyrus IMAP Features
- Speed optimization for email delivery
- Enhanced security protocols
- Efficient resource utilization
- Advanced search capabilities
- CardDAV support for contacts
- CalDAV support for calendars
- Robust data storage solutions
- Replication for data redundancy
- Scalability for large installations
- Flexible Sieve filtering options
- Integration with antivirus toolkits
- Comprehensive antispam tools
- SPF
- DKIM
- DMARC compliance
- Extensive authentication mechanisms
- Cyrus SASL integration
- JMAP support for JSON APIs
- Long list of supported standards
- Active community support
- Free and open source
- Continuous development since 1993.
