Stalwart
4 likes
Stalwart is an open-core mail server solution with JMAP, IMAP4, POP3, and SMTP support and a wide range of modern features. It is written in Rust and designed to be secure, fast, robust and scalable.
Cost / License
- Freemium (Subscription)
- Open Source (AGPL-3.0)
Application type
Platforms
- Self-Hosted
- Docker
- Linux
- Windows
- Mac
Features
Stalwart News & Activities
Highlights All activities
Recent activities
- fanpino commented on Stalwart
We migrated a university's entire mail system (10,000 mailboxes) from IceWarp to Stalwart earlier this year. Cost dropped from about $70k/year to under $4k, and JMAP support meant we didn't need to build a custom webmail on top of it - the built-in one was already good enough. The 0.16 admin panel upgrade made a real difference for day-to-day management. Only rough edge we hit during the migration was DNS/DKIM propagation, but that's more a mail-in-general thing than something specific to...
- fanpino liked Stalwart
- Bakrilum liked Stalwart
- Anthony_T thinks Spam Filter is a important feature of Stalwart
- Anthony_T updated Stalwart
- Anthony_T liked Stalwart
Stalwart information
Developed by
stalwartlabs Licensing
Open Source (AGPL-3.0) and Freemium product.Pricing
Subscription that costs from $5 per month + free version with limited functionality.Written in
Alternatives
6 alternatives listedBadge
Get an embeddable badge for StalwartSupported Languages
AlternativeTo Categories
Office & Productivity, Security & Privacy, Online ServicesGitHub repository
- 14,662 Stars
- 941 Forks
- 69 Open Issues
- Updated
Comments and Reviews
I've been using Stalwart Mail Server for almost two years now across five different domains, and it has become my primary self-hosted mail solution.
The 0.15 releases could sometimes feel challenging to manage, especially for advanced configurations, but the progress made with the 0.16 branch has been outstanding. The new WebUI is a huge improvement, and the addition of a dark theme was a very welcome change for daily administration.
What impressed me the most is the amount of work that went into version 0.16. The project moved to a unified JMAP-based management model, gained a completely new CLI, automated DNS management, automatic DKIM key rotation, API keys with granular permissions and restrictions, and support for modern identity providers such as Keycloak, Authentik, and Authelia. These are features that significantly simplify the operation of a production mail server.
I also appreciate the transparency of the developer. Communication is always professional and honest. He openly says that the project is getting closer to version 1.0 while acknowledging that no software is ever completely free of bugs. That level of honesty inspires confidence.
Another major advantage is that Stalwart is written in Rust, which contributes to excellent performance, low resource usage, and a strong focus on reliability and security. Despite its lightweight footprint, it includes an impressive amount of functionality out of the box that would normally require several separate services.
I highly recommend Stalwart to anyone looking for a modern, efficient, and feature-rich self-hosted mail server. Whether you're hosting one domain or many, it offers an excellent balance between performance, simplicity, and powerful built-in features.
We migrated a university's entire mail system (10,000 mailboxes) from IceWarp to Stalwart earlier this year. Cost dropped from about $70k/year to under $4k, and JMAP support meant we didn't need to build a custom webmail on top of it - the built-in one was already good enough. The 0.16 admin panel upgrade made a real difference for day-to-day management. Only rough edge we hit during the migration was DNS/DKIM propagation, but that's more a mail-in-general thing than something specific to Stalwart.