Imap GitHub Repositories (2026) · Open Source Tools

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

Hylki (formerly Vireo): a fast, GNOME-native email client built with Rust and libadwaita.

Self-hosted mail server for your own domain: SMTP/IMAP/POP3, CardDAV/CalDAV, React webmail and admin console, one-command Docker Compose.

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

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

✉️ Composable all-in-one mail server.

Manage mailboxes using IMAP without the PHP extension

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

Terminal-based email client for Linux and macOS

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

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

mailcow: dockerized - 🐮 + 🐋 = 💕

CLI to manage emails

Bichon – A lightweight, high-performance Rust email archiver with WebUI

💌 Mail app for Nextcloud

Emails at the heart of your business logic!

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

Homebrew tap for PHP extensions :beers:

DavMail POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 Gateway - Synced with main subversion repository at

Official master for the Greenmail project