stalwartlabs/stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV). observed · 2026-08-28
Health v2 · maintenance only
97/100
- Activity 99
- Release rhythm 99
- Longevity 91
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 7.0
- age_days: 1276
- days_rel: 9
- days_push: 7
- n_releases_24m: 55
Adoption not part of the score
14362 stars · 910 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Stalwart is an open-source, all-in-one mail and collaboration server written in Rust, supporting JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV and WebDAV with built-in spam and phishing protection. It replaces a traditional multi-component mail stack (MTA, message store, spam filter, calendar/contacts/file servers) with a single scalable, memory-safe server manageable via a WebUI, CLI, or JMAP API.
Use cases
- self-host my own email server
- run a mail server with IMAP and JMAP support
- host calendars and contacts with CalDAV and CardDAV
- replace Postfix/Dovecot/Rspamd with a single server
- set up SMTP mail delivery with DKIM, SPF and DMARC
- deploy a scalable mail server backed by PostgreSQL or S3
- filter spam and phishing without a separate daemon
- manage mail server configuration via API or CLI
When to choose
- you want one self-hosted server for email, calendars, contacts and files instead of stitching together multiple daemons
- you need modern JMAP support alongside legacy IMAP/POP3/SMTP compatibility
- you want a memory-safe, high-performance Rust server that scales from personal to enterprise clusters
- you need built-in anti-spam, encryption at rest, and flexible storage backends (RocksDB, PostgreSQL, S3, etc.)
When to avoid
- you need a lightweight mail retrieval proxy or a simple SMTP relay only
- you require a license other than AGPL v3 for commercial redistribution
- you depend on niche mail server extensions or third-party plugins not supported by Stalwart
- you prefer a battle-tested decades-old stack like Postfix + Dovecot with maximal ecosystem maturity
Facets
service · maturity active
http-server email security self-hosted search-engine email self-hosted backend security messaging-platforms windows self-hosted mail-server jmap imap smtp caldav carddav webdav anti-spam rust collaboration mta dkim sieve linux macos docker web-server
10 sources
- readme: https://github.com/stalwartlabs/stalwart · fetched 2026-08-28 · 2dc2de8fa6e4
- homepage: https://stalw.art · fetched 2026-08-29 · fb4294ce73bd
- site_page: https://stalw.art/docs/install/platform/linux · fetched 2026-08-29 · a06710403717
- site_page: https://stalw.art/docs/install/platform/windows · fetched 2026-08-29 · 06315e54fe4f
- site_page: https://stalw.art/docs/install/platform/docker · fetched 2026-08-29 · d0a8b039d407
- site_page: https://stalw.art/docs/install · fetched 2026-08-29 · d87bbfd857a5
- site_page: https://stalw.art/docs/configuration · fetched 2026-08-29 · d5824c3a422c
- site_page: https://stalw.art/docs/management · fetched 2026-08-29 · e054814674bd
- site_page: https://stalw.art/pricing · fetched 2026-08-29 · e95d8eca5d61
- site_page: https://stalw.art/integrations · fetched 2026-08-29 · 03801eb83355
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| stalwartlabs/stalwart | main | 97 |
For agents
markdown · JSON · MCP: product_card(name="stalwartlabs/stalwart")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem