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

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• Updated Nov 10, 2026
• Rust

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and about 20 MB of private memory at idle.

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• Updated Nov 12, 2026
• Rust

Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)

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• Updated Nov 12, 2026
• PHP

Self-hosted JMAP webmail for Stalwart Mail Server. Mail, calendar, contacts, and files in one client.

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• Updated Nov 12, 2026
• TypeScript

Emails at the heart of your business logic!

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• Updated Nov 12, 2026
• Java

terminal mail client, mirror of https://git.meli-email.org/meli/meli.git https://crates.io/crates/meli

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• Updated Nov 10, 2026
• Rust

A multi-platform (Flutter) application for reading your emails, with your favorite devices, using the JMAP protocol!

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• Updated Nov 12, 2026
• Dart

Stalwart JMAP server

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• Updated Oct 8, 2024
• Rust

CLI to synchronize PIM collections: mail, contact, calendar…

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• Updated Nov 8, 2026
• Rust

Let your agents read, send, and react to email autonomously, without human involvement

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• Updated Nov 11, 2026
• TypeScript

Modern JMAP webmail client built for Stalwart Mail Server. Privacy-focused, responsive, with real-time updates.

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• Updated Sep 20, 2026
• TypeScript

mnm implements TMTP protocol. Let Internet sites message members directly, instead of unreliable, insecure email. Contributors welcome! (Server)

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• Updated Jan 15, 2023
• Go

Self-hosted multi-account email client with support for JMAP/IMAP/SMTP, direct integration with Gmail and Outlook APIs. Also Contacts and Calendar. Built with Go, templ, and HTMX, SQLite for storage

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• Updated Nov 12, 2026
• Go

Bulwark Mobile: React Native client for iOS and Android. Mail, calendar and contacts over JMAP. Beta.

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• Updated Nov 12, 2026
• TypeScript

JMAP client library for Rust

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• Updated Sep 28, 2026
• Rust

Mailbox-native protocol and SDKs for asynchronous agent collaboration over email

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• Updated Jul 29, 2026
• TypeScript

Vandelay: the JMAP importer-exporter (and backup tool)

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• Updated Nov 11, 2026
• Rust

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• Updated Nov 12, 2026
• Java

Jam is a tiny (~2kb gzipped), strongly-typed JMAP client with zero runtime dependencies. It has friendly, fluent APIs that make working with JMAP a breeze.

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• Updated Nov 12, 2026
• TypeScript

TUI to manage emails

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• Updated Nov 8, 2026
• Rust