Modoboa vs Mailcow: Which Mail Server to Self-Host?
Quick Verdict
Mailcow is the better choice for most self-hosters. It bundles everything — SMTP, IMAP, webmail, antispam, admin panel, and DNS checks — in a single Docker Compose deployment that works out of the box. Modoboa is a capable admin panel and webmail client, but it requires separate Postfix and Dovecot configuration, making the overall setup significantly more complex.
Overview
Both platforms aim to simplify self-hosted email, but they approach the problem differently.
Mailcow is an all-in-one email server suite. Its Docker Compose file includes Postfix, Dovecot, SOGo webmail, Rspamd, ClamAV, and a custom admin UI. You run the installer, configure DNS, and have a working mail server.
Modoboa is a Django-based mail hosting management platform. It provides an admin panel for managing domains, mailboxes, and aliases, plus a webmail client. However, it doesn’t bundle the mail transport layer — you need Postfix and Dovecot set up separately, either on the host or via additional containers.
| Aspect | Modoboa | Mailcow |
|---|---|---|
| Language | Python (Django) | PHP + Shell + Docker |
| Architecture | Admin panel + webmail (MTA separate) | Complete mail stack in Docker |
| Docker Compose services | 4 (app, DB, Redis, worker) | 15+ (full mail stack) |
| Webmail | Built-in (Modoboa webmail) | SOGo (CalDAV/CardDAV included) |
| Antispam | Amavis + SpamAssassin (separate setup) | Rspamd (included) |
| License | ISC (open source) | GPLv3 |
| Latest version | 2.7.2 | Nightly (rolling releases) |
Feature Comparison
| Feature | Modoboa | Mailcow |
|---|---|---|
| Domain management | Yes (web UI) | Yes (web UI) |
| Mailbox management | Yes | Yes |
| Alias management | Yes | Yes + catch-all + SRS |
| Webmail | Built-in (functional) | SOGo (polished, CalDAV/CardDAV) |
| Antispam | SpamAssassin (requires setup) | Rspamd (pre-configured, learning) |
| Antivirus | ClamAV (requires setup) | ClamAV (included) |
| DKIM signing | Yes (admin panel) | Yes (auto-generated) |
| Rate limiting | Basic | Detailed per-domain/user |
| Quarantine | SpamAssassin integration | Built-in quarantine UI |
| Two-factor auth | No | Yes (TOTP, U2F) |
| API | REST API | REST API |
| Quota management | Per-domain, per-mailbox | Per-domain, per-mailbox |
| SOGo ActiveSync | No | Yes (mobile email sync) |
| DNS checker | No | Yes (built-in MX/SPF/DKIM/DMARC check) |
| Backup tools | Manual | Built-in backup/restore scripts |
| Logging/monitoring | Basic | Detailed with Netfilter integration |
Installation Complexity
This is where the difference matters most.
Mailcow:
git clone https://github.com/mailcow/mailcow-dockerized
cd mailcow-dockerized
./generate_config.sh # Interactive — asks for hostname and timezone
docker compose up -dThat’s the entire server setup. Postfix, Dovecot, Rspamd, SOGo, and the admin panel all start and configure themselves. The generate_config.sh script generates TLS certificates, DKIM keys, and sensible defaults.
Modoboa:
- Install PostgreSQL and Redis (Docker or host)
- Deploy Modoboa containers (API + worker)
- Run database migrations and create admin user
- Install and configure Postfix separately
- Install and configure Dovecot separately
- Install and configure Amavis + SpamAssassin (optional)
- Install and configure ClamAV (optional)
- Configure Postfix to use Modoboa’s database for virtual domains and mailboxes
- Configure Dovecot authentication against Modoboa’s database
Modoboa’s installer script automates steps 4–9 on a bare metal or VM install, but it doesn’t work in a fully Dockerized environment. If you want everything in containers, you’re doing most of the mail stack configuration manually.
Performance and Resource Usage
| Metric | Modoboa | Mailcow |
|---|---|---|
| RAM (idle) | 1–2 GB (admin only) / 3–4 GB (with mail stack) | 3–4 GB |
| RAM (with ClamAV) | 4–5 GB | 4–5 GB |
| CPU | Low | Low–Medium |
| Disk (application) | ~500 MB (admin), mail stack varies | ~2 GB (all services) |
| Container count | 4 (Modoboa only) | 15+ |
Both use roughly the same total resources when running a complete mail stack, because the resource-heavy components are the same: Postfix, Dovecot, ClamAV, and the spam filter. Mailcow just packages them all together.
Community and Support
| Metric | Modoboa | Mailcow |
|---|---|---|
| GitHub stars | 3,100+ | 9,500+ |
| Documentation | Good (official docs) | Excellent (comprehensive) |
| Community | Small (GitHub, Discourse) | Large (GitHub, Telegram, Reddit) |
| Commercial support | Third-party | Official paid support available |
| Update frequency | Monthly releases | Rolling (nightly images) |
Mailcow has a significantly larger community. Self-hosted email is complex, and having a large community to search for solutions matters. Mailcow’s documentation covers edge cases that Modoboa’s doesn’t.
Use Cases
Choose Modoboa If…
- You already run Postfix and Dovecot and want a modern admin UI on top
- Your infrastructure requires specific mail stack configurations that Mailcow’s opinionated setup doesn’t support
- You need Django-based extensibility for custom email management workflows
- You prefer managing mail components individually rather than as a monolith
Choose Mailcow If…
- You want a complete, working email server with one
docker compose up -d - You need SOGo’s CalDAV/CardDAV for calendar and contacts (mobile sync via ActiveSync)
- DNS configuration checks, DKIM auto-generation, and built-in quarantine matter to you
- You want the largest community for troubleshooting self-hosted email
Final Verdict
Mailcow is the clear winner for self-hosted email. It does everything Modoboa does and more, with dramatically less setup effort. The all-in-one Docker deployment means you get a working mail server in 15 minutes instead of spending hours configuring Postfix, Dovecot, and spam filters individually.
Modoboa’s value is narrow: it’s a good admin panel for existing mail infrastructure. If you already have Postfix and Dovecot running and want a web interface to manage domains and mailboxes, Modoboa is worth considering. For new deployments, use Mailcow.
FAQ
Is Modoboa a complete email server?
No. Modoboa is an admin panel and webmail client — it manages domains, mailboxes, and aliases in a database. You still need to install and configure Postfix (SMTP) and Dovecot (IMAP) separately, then connect them to Modoboa’s database. Mailcow bundles everything — admin panel, webmail, Postfix, Dovecot, spam filtering, and antivirus — in one Docker Compose deployment.
Can I add Modoboa to my existing Postfix/Dovecot setup?
Yes — this is Modoboa’s primary use case. If you already have a working Postfix + Dovecot installation and want a web-based admin panel, Modoboa can be added on top. Configure Postfix and Dovecot to use Modoboa’s PostgreSQL database for virtual domains and mailboxes. The Modoboa installer script automates this on bare-metal installs.
Does Modoboa support Docker deployment?
Modoboa has an official Docker image, but it only covers the admin panel and webmail — not the full mail stack. You would need additional containers for Postfix, Dovecot, SpamAssassin, and ClamAV, all configured to work together. Mailcow provides this as a single, tested Docker Compose stack.
Which has better API support?
Both have REST APIs. Mailcow’s API is more comprehensive — it covers domains, mailboxes, aliases, DKIM, transport maps, quarantine, and server status. Modoboa’s API covers domain and mailbox management but is less extensive. If you automate mail server management (creating accounts via scripts, integration with identity providers), mailcow’s API is more capable.
Can Modoboa’s webmail replace SOGo?
For basic email reading and sending, yes. Modoboa’s webmail is functional and responsive. However, it does not include calendar (CalDAV), contacts (CardDAV), or ActiveSync support. SOGo (in mailcow) provides full groupware functionality — shared calendars, contact management, and mobile email sync via ActiveSync. If you need more than just webmail, mailcow’s SOGo is significantly more capable.
Is Modoboa suitable for hosting providers?
Modoboa was originally designed for hosting providers who manage many mail domains. Its per-domain and per-user quota management, delegation features, and API make it suitable for multi-tenant email hosting. Mailcow also supports multi-domain hosting but is more oriented toward single-organization deployments with its all-in-one approach.
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