Simple NixOS Mailserver
NixOS module for running a complete email server stack
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Simple NixOS Mailserver is a set of NixOS modules that helps you declaratively run a complete mail server on NixOS. It aims to provide a reasonably secure, maintainable setup for hosting email domains with a reproducible Nix configuration.
Key Features
- Declarative NixOS configuration for end-to-end mail server deployment
- SMTP service with modern TLS and authentication options
- IMAP mail access for user mailboxes
- Spam filtering integration and common email hygiene features
- Email authentication support (DKIM, DMARC, SPF)
- Optional webmail support depending on chosen configuration
- Designed to fit naturally into NixOS system management and upgrades
Use Cases
- Self-hosting email for a personal domain on NixOS
- Running mail for small organizations that want reproducible infrastructure
- Homelab mail setups with strong control over configuration and updates
Limitations and Considerations
- Intended for NixOS; not a general-purpose mailserver installer for other distributions
- Deliverability depends on DNS correctness and IP reputation, which must be managed externally
Simple NixOS Mailserver is best suited to users who want an opinionated but flexible email stack managed entirely through NixOS. It provides building blocks for a complete mail system while keeping configuration reproducible and auditable.
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