Deploy Docker Mailserver on your own server.

Stalwart is a modern, all-in-one mail and collaboration server written in Rust for security and performance. It bundles SMTP, IMAP, JMAP, POP3, CalDAV, CardDAV, and WebDAV into a single binary with a unified configuration. Features include a built-in spam and phishing filter with LLM-driven analysis, DMARC/DKIM/SPF/ARC authentication, encryption at rest with S/MIME or OpenPGP, automatic TLS via ACME, full-text search in 17 languages, Sieve scripting, and a web-based admin dashboard. It supports pluggable storage backends (RocksDB, FoundationDB, PostgreSQL, MySQL, SQLite, S3, Redis) and scales from a single instance to thousands of nodes with built-in clustering, load balancing, and fault tolerance.

Poste is a self-hosted mail server solution that provides a complete and secure email hosting platform. It offers built-in features such as spam filtering, DKIM signing, and webmail access to ensure a reliable email experience. This app is a Docker containerized version of Poste, making it easy to deploy and manage across various environments.

MailCrab is an email test server designed for development purposes. It is an accept-all SMTP server that provides a web interface for viewing and inspecting all incoming emails. You can view formatted mail, download attachments, view headers, or view the complete raw mail contents. The app runs on all amd64 and arm64 platforms using docker. The backend server and the frontend of the app are both written in Rust. The backend receives email over an unencrypted connection on a configurable port, and all email is stored in memory while the application is running. The frontend initially performs a call to receive all existing email metadata and then subscribes for new messages using the websocket connection. When opening a message, the endpoint is used to retrieve the complete message body and raw email. The backend also accepts a few commands over the websocket, to mark a message as opened, to delete a single message or delete all messages.