stalwart

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

imap
jmap
mail
rust
server
smtp
pop3
caldav
carddav
webdav

View on GitHub

Stars: 15,070
Forks: 986
+ today: +1
Created: 3y

Ranking data as of October 12, 2026 (UTC).

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15,070 stars

Overview

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV). It ranks #3008 on GitTiger, gaining +1 star on October 12, 2026 (UTC).

The project is written in Rust and has 986 forks. It was created 3y ago.

Installation

git clone https://github.com/stalwartlabs/stalwart.git
cd stalwart
# see README for setup