Welcome to NixOS Mailserver's documentation!

• Setup Guide
  • Requirements
  • Configure forward DNS records
  • Verify DNS record propagation
  • Setup the server
  • Configure DNS records
  • Test your Setup
  • Join the community
  • Next steps
• Advanced Configurations
• Contribute or troubleshoot
  • Development Shell
  • Run NixOS tests
  • Contributing to the documentation
  • Manual migrations
• FAQ
  • catchAll users can't send email as user other than themself
• Release Notes
  • NixOS 26.05
  • NixOS 25.11
  • NixOS 25.05
  • NixOS 24.11
  • NixOS 24.05
  • NixOS 23.11
  • NixOS 23.05
  • NixOS 22.11
  • NixOS 22.05
  • NixOS 21.11
  • NixOS 21.05
  • NixOS 20.09
• Mailserver options
  • mailserver
  • mailserver.accounts
  • mailserver.x509
  • mailserver.storage
  • mailserver.dkim
  • mailserver.srs
  • mailserver.dmarcReporting
  • mailserver.tlsrpt
  • mailserver.fullTextSearch
  • mailserver.quota
  • mailserver.redis
  • mailserver.ldap
  • mailserver.monitoring
  • mailserver.backup
  • mailserver.borgbackup
• Migrations
  • NixOS 26.05
  • NixOS 25.11

Account backends

• LDAP

Features

• DKIM Signing
• Full text search
• Sender Rewriting Scheme

How-to

• Autodiscovery
  • Legacy records
  • Client support
    • Unsupported
  • Vendor-specific autoconfig
• Backup Guide
• Flakes
• Tune spam filtering
  • Auto-learning
  • Train from existing folders
  • Tune symbol weight
  • Tune action thresholds
  • Access the rspamd web UI
    • With ssh forwarding
    • With an nginx reverse-proxy

Integrations

• Radicale
  • Limitations
  • Code
• Roundcube
  • Code

Indices and tables

• Index

• Module Index

• Search Page