docker-mailserver

Self-Hosted

Full-featured self-hosted email server in a Docker container

Overview

docker-mailserver is a containerized, self-hosted email solution packing a full stack (SMTP, IMAP, POP3) with essential security and anti-spam tools. Deployable via Docker Compose, it supports multiple domains and includes DKIM/DMARC/SPF setup, TLS encryption, fail2ban, SpamAssassin, and ClamAV. Configurable via environment variables and volume mounts, it avoids complex manual setup of individual components. Ideal for self-hosters seeking control over email data, it’s lightweight, flexible, and compatible with most email clients, making it a reliable alternative to SaaS providers.

Self-Hosting Resources

Find Official Image on Docker Hub View Source & Docs

Below is a reference structure for docker-compose.yml. ⚠️ Do NOT run blindly. Replace placeholders with official values.

docker-compose.template.yml TEMPLATE


version: '3'
services:
  docker_mailserver:
    image: <OFFICIAL_IMAGE_NAME>:latest
    container_name: docker-mailserver
    ports:
      - "8080:<APP_INTERNAL_PORT>"
    volumes:
      - ./data:/app/data
    restart: unless-stopped

Key Features

Containerized SMTP/IMAP/POP3 stack
Built-in security (DKIM, DMARC, TLS, fail2ban)
Anti-spam (SpamAssassin) & anti-virus (ClamAV)
Multi-domain support
Easy deployment with Docker Compose

Frequently Asked Questions

? Is docker-mailserver hard to install?

It’s designed for simplicity with Docker Compose. Basic Docker knowledge helps, but official docs offer step-by-step guides. You’ll need to configure a docker-compose.yml, set up DNS records (MX, DKIM, SPF), and manage volumes—no complex manual stack setup required.

? Is it a good alternative to Gmail Workspace?

Yes, if you prioritize data control over SaaS conveniences. It provides core email features but lacks collaborative tools (docs, calendar) of Gmail Workspace. It’s ideal for users wanting to avoid third-party email providers and own their data.

? Is it completely free?

Yes, docker-mailserver is open-source (MIT license) and free to use. Costs include hosting (VPS/domain), backups, and maintenance—no subscription fees for the software itself.

Top Alternatives

Gmail Workspace Search Google

Microsoft 365 Search Google

Tool Info

Pricing Open Source

Category Communication - Email - Complete Solutions

Platform Self-Hosted

Pros

⊕ Full data privacy and control
⊕ No subscription fees
⊕ Pre-configured security tools
⊕ Flexible configuration options

Cons

⊖ Requires DNS expertise for deliverability
⊖ No built-in webmail interface
⊖ Server maintenance (updates, backups)
⊖ Potential deliverability issues without proper setup