Deltachat Desktop alternatives for AI agents.

: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

:postbox: Gmail desktop app for macOS, Windows & Linux (formerly Gmail Desktop)

The open-source communication infrastructure for agents and products

Modern email for teams and professionals. A replacement for outdated email technology and tools. Alt to hey.com, front.com, missiveapp.com

A cross-platform .NET library for IMAP, POP3, and SMTP.

💌 Build and send emails using React

✉️ Composable all-in-one mail server.

Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

Insular email distribution - mail server as Docker images

CLI to manage emails

Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat