stalwartlabs / stalwart

git clone https://github.com/stalwartlabs/stalwart.git v0.16.27 · 5d ago 🔥 on GitHub Trending today

Open-source mail and collaboration server supporting JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV and WebDAV, written in Rust.

Why you might care

A single self-hostable server that covers email delivery, mailbox access, calendars, contacts and file sharing instead of running separate daemons for each. It includes built-in spam filtering, DKIM/SPF/DMARC/ARC authentication and DANE/MTA-STS transport security, aimed at operators who want to run their own mail stack.

Alternatives

PostfixDovecotMailcowCyrus IMAPNextcloud

+23

stars, 24h · #1,571

+~140

stars, 7 days · #1,633

+~600

stars, 30 days · #1,433

15k

★ total · +1% this week

1.0k

forks · 54 open issues

Star history (as recorded here)

2026-10-20 · 15,192 ★ 2026-10-24 · 15,272 ★

LanguageRust

License—

Created2023-03-06 (3y ago)

Last push4d ago

Watchers85

OwnerOrganization

Seen on GitHub Trending

2026-10-24 — #10 daily in rust · +23 ★

GitHub topics

caldav carddav imap jmap mail pop3 rust server smtp webdav

README

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Blurb generated by claude-haiku-5-5 today. Star deltas marked ~ are extrapolated from partial history.