70256c7d6e
Flake lock file updates:
• Updated input 'flake-compat':
'github:edolstra/flake-compat/9100a0f413b0c601e0533d1d94ffd501ce2e7885' (2025-05-12)
→ 'github:edolstra/flake-compat/f387cd2afec9419c8ee37694406ca490c3f34ee5' (2025-10-27)
• Updated input 'git-hooks':
'github:cachix/git-hooks.nix/54df955a695a84cd47d4a43e08e1feaf90b1fd9b' (2025-09-17)
→ 'github:cachix/git-hooks.nix/ca5b894d3e3e151ffc1db040b6ce4dcc75d31c37' (2025-10-17)
• Updated input 'nixpkgs':
'github:NixOS/nixpkgs/e9f00bd893984bc8ce46c895c3bf7cac95331127' (2025-09-28)
→ 'github:NixOS/nixpkgs/b3d51a0365f6695e7dd5cdf3e180604530ed33b4' (2025-11-02)
• Updated input 'nixpkgs-25_05':
'github:NixOS/nixpkgs/5ed4e25ab58fd4c028b59d5611e14ea64de51d23' (2025-09-29)
→ 'github:NixOS/nixpkgs/3de8f8d73e35724bf9abef41f1bdbedda1e14a31' (2025-11-01)
Release branches
For each NixOS release, we publish a branch. You then have to use the SNM branch corresponding to your NixOS version.
- For NixOS 25.05
- For NixOS 24.11
- For NixOS unstable
- Use the SNM branch
master - Documentation
- Use the SNM branch
Features
- Continous Integration Testing
- Multiple Domains
- Postfix
- SMTP on port 25
- Submission TLS on port 465
- Submission StartTLS on port 587
- LMTP with Dovecot
- Dovecot
- Maildir folders
- IMAP with TLS on port 993
- POP3 with TLS on port 995
- IMAP with StartTLS on port 143
- POP3 with StartTLS on port 110
- Certificates
- ACME
- Custom certificates
- Spam Filtering
- Via Rspamd
- Virus Scanning
- Via ClamAV
- DKIM Signing
- Via Rspamd
- User Management
- Declarative user management
- Declarative password management
- LDAP users
- Sieve
- Allow user defined sieve scripts
- Moving mails from/to junk trains the Bayes filter
- ManageSieve support
- User Aliases
- Regular aliases
- Catch all aliases
In the future
- Automatic client configuration
- DKIM Signing
- Allow per domain selectors
- Allow passing DKIM signing keys
- Improve the Forwarding Experience
- User management
- Allow local and LDAP user to coexist
- OpenID Connect
- Depends on relevant clients adding support, e.g. Thunderbird
Get in touch
- Matrix: #nixos-mailserver:nixos.org
- IRC:
#nixos-mailserveron Libera Chat
How to Set Up a 10/10 Mail Server Guide
Check out the Setup Guide in the project's documentation.
For a complete list of options, see in readthedocs.
Development
See the How to Develop SNM documentation page.
Contributors
See the contributor tab
Alternative Implementations
Credits
- send mail graphic by tnp_dreamingmao from TheNounProject is licensed under CC BY 3.0
- Logo made with Logomakr.com