stalwart

<p align="center">
    <a href="https://stalw.art">
    <img src="./img/logo-red.svg" height="150">
    </a>
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  Secure, scalable mail & collaboration server with comprehensive protocol support 🛡️ <br/>(IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV)
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<p align="center">
  <a href="https://github.com/stalwartlabs/stalwart/actions/workflows/ci.yml"><img src="https://img.shields.io/github/actions/workflow/status/stalwartlabs/stalwart/ci.yml?style=flat-square" alt="continuous integration"></a>
  &nbsp;
  <a href="https://www.gnu.org/licenses/agpl-3.0"><img src="https://img.shields.io/badge/License-AGPL_v3-blue.svg?label=license&style=flat-square" alt="License: AGPL v3"></a>
  &nbsp;
  <a href="https://stalw.art/docs/install/get-started"><img src="https://img.shields.io/badge/read_the-docs-red?style=flat-square" alt="Documentation"></a>
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  <a href="https://github.com/stalwartlabs/stalwart/releases"><img src="https://img.shields.io/github/downloads/stalwartlabs/stalwart/total?style=flat-square" alt="downloads"></a
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  <a href="https://mastodon.social/@stalwartlabs"><img src="https://img.shields.io/mastodon/follow/109929667531941122?style=flat-square&logo=mastodon&color=%236364ff&label=Mastodon" alt="Mastodon"></a>
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  <a href="https://discord.gg/vhqRgdhguq"><img src="https://img.shields.io/discord/923615863037390889?label=Discord&logo=discord&style=flat-square" alt="Discord"></a>
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## Features

**Stalwart** is an open-source mail & collaboration server with JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV and WebDAV support and a wide range of modern features. It is written in Rust and designed to be secure, fast, robust and scalable.

Key features:

- **Email** server with complete protocol support:
  - JMAP: 
    * [JMAP for Mail](https://datatracker.ietf.org/doc/html/rfc8621) server.
    * [JMAP for Sieve Scripts](https://www.rfc-editor.org/rfc/rfc9661.html).
    * [JMAP Object Metadata](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-metadata-04) for e-mails, mailboxes, calendars, contacts, files and Sieve scripts.
    * [WebSocket](https://datatracker.ietf.org/doc/html/rfc8887), [Blob Management](https://www.rfc-editor.org/rfc/rfc9404.html) and [Quotas](https://www.rfc-editor.org/rfc/rfc9425.html) extensions.
  - IMAP:
    * [IMAP4rev2](https://datatracker.ietf.org/doc/html/rfc9051) and [IMAP4rev1](https://datatracker.ietf.org/doc/html/rfc3501) server.
    * [ManageSieve](https://datatracker.ietf.org/doc/html/rfc5804) server.
    * Numerous [extensions](https://stalw.art/docs/development/rfcs#imap4-and-extensio