Cyrus IMAP

Cyrus IMAP

The Cyrus Team
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About

Cyrus IMAP is an email, contacts and calendar server. Cyrus is free and open source. Features: Speed Security Efficiency Search CardDAV and CalDAV support Robust data storage Replication Scalable for large installations Flexible filtering support through Sieve Supports antivirus and antispam toolkits Handles deliverability: SPF, DKIM, DMARC Extensive authentication options, through Cyrus SASL JMAP support Long list of supported standards

About

SuperMailOS is managed business email on your own domain for small teams. You bring your domain; SuperMailOS runs the mail server and handles deliverability — SPF, DKIM, DMARC, IP reputation, and warmup — so your email lands in the inbox, not the spam folder. Setup takes minutes: verify your domain with one-click DNS on Cloudflare, DigitalOcean, and other providers (or guided copy-paste on any registrar), invite your team, and start sending. Every person gets a real mailbox; aliases like hello@ and support@ are unlimited and free. Webmail is as simple as Gmail — threads, instant search, keyboard shortcuts, labels, dark mode — plus IMAP and SMTP for any mail app, and a live deliverability dashboard showing your mail landing. Flat pricing per mailbox: Pro $3/mailbox/month annually (10 GB, 3 domains), Business $5 (30 GB, unlimited domains), custom at 50+. 14-day free trial, no credit card.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Anyone interested in an open source mail and calendar server

Audience

Small and medium businesses, startups, agencies, and freelancers who want professional email on their own domain without running a mail server or managing DNS and deliverability themselves.

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

Free
Open source
Free Version
Free Trial

Pricing

$3/month per mailbox
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

The Cyrus Team
Founded: 1993
www.cyrusimap.org

Company Information

SuperMailOS
Founded: 2026
supermailos.com

Alternatives

Alternatives

Hermes SEG

Hermes SEG

Black Fish Networks LLC
MLM Superb

MLM Superb

Cyrus Technoedge Solution
Mutant Mail

Mutant Mail

Fresent

Categories

Categories

Integrations

CentOS
Debian
Fedora
Red Hat Enterprise Linux
Ubuntu
Workers by Delos
openSUSE Leap
openSUSE MicroOS
openSUSE Tumbleweed

Integrations

CentOS
Debian
Fedora
Red Hat Enterprise Linux
Ubuntu
Workers by Delos
openSUSE Leap
openSUSE MicroOS
openSUSE Tumbleweed
Claim Cyrus IMAP and update features and information
Claim Cyrus IMAP and update features and information
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