flectar/mail
Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.
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Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.
MailCraft: an open-source, clean-room mail, calendar and contacts program in pure Rust, for Microsoft 365, Outlook.com and IMAP. Early alpha.
mailcow: dockerized - 🐮 + 🐋 = 💕
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
CLI to manage emails
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
Bichon – A lightweight, high-performance Rust email archiver with WebUI
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
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.
📨 An open-source email client built around your privacy, cross-platform with zero telemetry, fully yours.
Hylki (formerly Vireo): a fast, GNOME-native email client built with Rust and libadwaita.
💌 Mail app for Nextcloud
Insular email distribution - mail server as Docker images
Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧
Built-in Mail & Calendars app clone for Windows.
Decentralized private messenger with chat-shared tools and games for Desktop
A self-hosted Email Middleware for IMAP, SMTP, Gmail API, Graph API — built for developers
Parula - New full-featured desktop email, chat and video conference client
Official master for the Greenmail project
Self-hosted mail server for your own domain: SMTP/IMAP/POP3, CardDAV/CalDAV, React webmail and admin console, one-command Docker Compose.
A cross-platform .NET library for IMAP, POP3, and SMTP.
✉️ Composable all-in-one mail server.
Open-source email infrastructure for AI agents: secure inboxes, REST and MCP APIs, SMTP, human approval workflows, signed webhooks, and Python and TypeScript SDKs. Self-host with Docker and PostgreSQL.
End-to-end encrypted email for the mesh networking age
Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.
Emails at the heart of your business logic!
Mail-Archiver is a web application for archiving, searching, and exporting emails from multiple accounts. Featuring folder sync, attachment support, mailbox migration and a dashboard.
Homebrew tap for PHP extensions :beers:
Mailozaurr is a PowerShell module that aims to provide SMTP, POP3, IMAP and probably some other ways to interact with Email. Underneath it uses MimeKit and MailKit libraries written by Jeffrey Stedfast.
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