stalwart

stalwart

A modern, high-performance mail server with IMAP, JMAP, and SMTP support

13k 762 last commit 2026-03-05
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All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

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  • Mail Server
    Core

    Send and receive email for hosted domains

  • IMAP and SMTP Support
    Core

    Serve email using standard protocols

  • Spam Filtering
    Core

    Filter unwanted email messages

  • User and Domain Management

    Manage mail users and domains

  • Message Storage

    Store and retrieve email messages

  • Self-Hosted Deployment

    Run the mail server on your own infrastructure

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