Mailtrain

Mailtrain is a self-hosted newsletter application for organizations that can operate their own server and database. It is best suited to teams needing detailed access controls and automated campaigns rather than a hands-off hosted sender. The trade-off is administrative responsibility: deployment, upgrades, and infrastructure remain yours.

Overview

Mailtrain brings subscriber administration, campaign creation, templates, and reporting into one Node.js application backed by MySQL or MariaDB. Segmentation and custom fields allow more precise audience organization, while triggered and RSS campaigns cover recurring or event-driven newsletters. Zone-MTA is intended to make mail delivery close to a ready-made component, but it does not remove the work of running a self-hosted system.

Collaboration is a major differentiator. Granular permissions and flexible sharing let teams divide responsibilities, and hierarchical namespaces provide a way to structure larger organizations. Mailtrain also separates trusted, sandbox, and public endpoints, a security design aimed at reducing XSS exposure when multiple users share the installation.

Key features

• Subscriber lists: List management, segmentation, and custom fields support targeted audience workflows instead of one undifferentiated database.
• Automation: Triggered and RSS campaigns can keep recurring content or event-based sends moving without manual launches.
• Templates: Standard email templates and MJML-based templates give teams a reusable production workflow.
• Reporting: Custom reports are useful when a team needs its own reporting views rather than a fixed dashboard.
• Team access: Granular permissions, sharing controls, and hierarchical namespaces suit departments or enterprise-style arrangements.
• Delivery and integration: Zone-MTA reduces mail-delivery setup, while Docker can enable LDAP or CAS authentication and optionally expose an API access token.
• Deployment choices: Docker Compose and direct installation on CentOS 7 or Ubuntu 18.04 LTS are documented, giving administrators more than one installation route.

Pricing

Mailtrain v2 is free: the sole plan costs nothing and is self-hosted. It includes a newsletter website, custom domain support, and API access, with no paid tier or free-trial period. The price is attractive for organizations that already have infrastructure and staff, but “free” does not mean managed hosting; server, database, maintenance, and delivery operations remain part of the ownership cost.

The published minimum recommendation is 2 vCPU and 4096 MB of RAM. Mailtrain v2 also requires Node.js 14 or later with MySQL 8 or later, or MariaDB 10 or later. Docker deployments should change ADMIN_PASSWORD during setup because the default is test; leaving it unchanged is an avoidable security risk.

Platforms

Mailtrain provides an API and web interface for Linux, with self-hosted deployment as its operating model. Docker Compose is documented alongside direct installation, and the authentication options in Docker include LDAP and CAS.

Who it's for

Choose Mailtrain when your organization wants ownership of newsletter data, a custom domain, API access, and fine-grained permissions across several users. It is particularly suitable for teams that can administer Linux services and databases, or for organizations that need namespaces and controlled sharing between groups.

Look elsewhere if you want a hosted service that absorbs infrastructure work, or if your audience and workflow only require a simple personal newsletter. The Node.js, database, and hardware prerequisites add operational overhead that smaller publishers may not want.

Pros and cons

Pros

• Broad audience controls: Segmentation and custom fields support targeted subscriber organization.
• Useful automation: Triggered and RSS campaigns handle recurring and event-driven sends.
• Strong collaboration model: Permissions, sharing, and hierarchical namespaces are more capable than a basic single-user setup.
• Open deployment and licensing: The GPL-V3.0 license and self-hosted model provide control over the software and environment.
• Included delivery component: Zone-MTA can reduce initial mail-delivery configuration.

Cons

• Real administration burden: You must run the application, database, and server rather than relying on a vendor-managed service.
• Non-trivial prerequisites: Node.js 14+, MySQL 8+/MariaDB 10+, and 2 vCPU with 4096 MB RAM raise the entry bar.
• Security setup is essential: The Docker default administrator password must be replaced before use.
• Older documented operating systems: Direct-install guidance targets CentOS 7 and Ubuntu 18.04 LTS, which may require planning in newer environments.

Alternatives

phpList is a better fit if you want a freemium option with a free tier allowing 300 messages and unlimited subscribers, plus a trial.

listmonk suits readers seeking free, open-source self-hosted software across more operating systems, provided they can run PostgreSQL.

Audienceful is preferable for a hosted API and web workflow with a free plan capped at 1,000 contacts, one collaborator, and one automated journey.

Curated is aimed at publishers wanting a hosted browser extension and web service, with a free range of 0–1,500 subscribers.

Kit fits creators who want a hosted free newsletter plan for up to 10,000 subscribers and a basic visual automation.

Substack is the simpler hosted choice for Android, iOS, and web publishing with no platform fees, tiers, or contracts on its free-to-start plan.

Sympa is another free self-hosted option, but it requires administrator-managed mail, database, and web-server components.

Dada Mail is an alternative self-hosted and web-based newsletter application.

For broader comparisons, see Newsletter Platforms and Email Marketing Software.

Verdict

Mailtrain is a strong choice for technically capable teams that need self-hosted newsletter control, automation, and carefully partitioned user access at no software cost. Choose it for ownership and organizational depth; look elsewhere if avoiding server administration and runtime maintenance matters more than control.