Mailcow vs iRedMail vs Mail-in-a-Box — Which in 2024?

Choosing a self-hosted email platform in 2024 comes down to three main contenders — Mailcow, iRedMail and Mail-in-a-Box. Here is how they compare across every dimension that matters.

Feature Comparison

Feature              Mailcow    iRedMail   Mail-in-a-Box
─────────────────────────────────────────────────────────
Installation         Docker     Script     Script
Min RAM              3GB        2GB        1GB
Webmail              SOGo       Roundcube  Roundcube
Admin UI             Yes        Yes        Yes
Anti-spam            Rspamd     Amavis     SpamAssassin
Antivirus            ClamAV     ClamAV     ClamAV
DKIM auto            Yes        Yes        Yes
Let's Encrypt        Auto       Manual     Auto
2FA support          Yes        Limited    Yes
API                  Yes        No         Limited
Updates              Docker     Manual     Built-in
Multi-domain         Yes        Yes        Limited

Mailcow — Best for Most

Pros:
+ Modern Docker architecture
+ Best admin UI
+ Rspamd (better than SpamAssassin)
+ Active development
+ REST API for automation
+ Easy updates

Cons:
- Requires 3GB+ RAM
- Docker knowledge helpful
- More complex setup

iRedMail — Best for Traditionalists

Pros:
+ Traditional stack (easier to debug)
+ Lower RAM requirements
+ Works on CentOS/AlmaLinux too
+ Large knowledge base

Cons:
- Older architecture
- Less polished UI
- Updates require more care
- No Docker option

Mail-in-a-Box — Best for Beginners

Pros:
+ Easiest installation
+ Automatic everything
+ Built-in DNS management
+ Good documentation

Cons:
- Ubuntu only
- Limited customisation
- Single server only
- Less suitable for production

Recommendation by Use Case

• Small business (5-50 users): Mailcow
• Developer/personal: Mail-in-a-Box
• Enterprise/legacy: iRedMail
• Hosting provider: Mailcow with multi-tenancy

Conclusion

Mailcow wins in 2024 for most use cases. Our team installs and manages all three platforms — contact us for a recommendation based on your specific requirements.