Mailu Docker Mail Server

Mailu is a simple yet full-featured mail server running as a set of Docker containers, designed to be easy to deploy and maintain while providing all essential email services. Originally based on the freeposte.io project, Mailu offers a lightweight alternative to complex mail server setups. Key features: all-in-one Docker mail server with isolated containers for each service (front, imap, smtp, antispam, antivirus, webmail, admin). Postfix SMTP server with TLS, SPF, DKIM, DMARC, and ARC support for deliverability and authentication. Dovecot IMAP and POP3 server with full-text search, sieve filtering, and push notifications. Rspamd spam filtering with machine learning, greylisting, and custom scoring rules. ClamAV antivirus scanning for all email attachments. Roundcube or SnappyMail webmail interface with plugin support. Admin web interface for domain and mailbox management, aliases, forwarding, and user self-service. Automatic Lets Encrypt certificate provisioning and renewal. Webmail and admin access behind an Nginx reverse proxy with SNI support. Per-domain administrator delegation for multi-tenant hosting. Fetchmail for retrieving emails from external accounts. Flexible deployment options including compose file, Portainer, or Kubernetes. Internationalized domain name IDN support. Open source under MIT license.