flectar / mail

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.

UCS-Care-Group / mailcraft

MailCraft: an open-source, clean-room mail, calendar and contacts program in pure Rust, for Microsoft 365, Outlook.com and IMAP. Early alpha.

c9dev / penguin-mail

Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.

floatpane / matcha

A beautiful and functional email client for your terminal, built with Go and the charming Bubble Tea TUI library. Never leave your command line to check your inbox or send an email again!

rustmailer / rustmailer

A self-hosted Email Middleware for IMAP, SMTP, Gmail API, Graph API — built for developers

Site-19 / The-Bat-Secure-Mail-Setup

The Bat Email Client for Windows 11 and 10 Secure Setup Guide 2026

melian69 / Thunderbird-Mail-Client-Setup-Guide

Thunderbird Setup Guide 2026: Easy Email Client Install for Windows 11 & 10

edermarquesdias-cpu / Mailbird-Windows-Setup-Guide

Mailbird Setup Guide for Windows 11 and 10 in 2026: Easy Install and Email Configuration

Timskull / Postbox-Windows-Setup-Guide

Postbox Email Client for Windows 11 and 10: Install, Setup and Configuration Guide 2026