Mailu / Mailu

Insular email distribution - mail server as Docker images

roundcube / roundcubemail

The Roundcube Webmail suite

ProtonMail / WebClients

Monorepo hosting the proton web clients

imapsync / imapsync

Imapsync is an IMAP transfers tool. The purpose of imapsync is to migrate IMAP accounts or to backup IMAP accounts. IMAP is one of the three current standard protocols to access mailboxes, the two others are POP3 and HTTP with webmails, webmails are often tied to an IMAP server. Upstream website is

inbucket / inbucket

Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.

Alinto / sogo

SOGo is a very fast and scalable modern collaboration suite (groupware). It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (IMAP, CalDAV, CardDAV, etc.) and thereby provides native connectivity (without plugins) to many clients such as Microsoft Outlook, Apple iCal, the iPhone, Mozilla Lightning, and a plethora of mobile devices.

mailvelope / mailvelope

Browser extension for OpenPGP encryption with Webmail

cypht-org / cypht

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

bulwarkmail / webmail

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

kurrier-org / kurrier

Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.

nextcloud / mail

💌 Mail app for Nextcloud

maathimself / mailflow

A self-hosted, unified webmail client.

mailez-hq / mailez

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

mibgb65-cloud / OmniMail

Self-hosted multi-domain webmail on Cloudflare Workers, D1, R2, Queues, Email Routing, and Resend.

chenyuwebwawa / OpenMail

A self-hosted, open-source mail server suite in a single Node.js process — full-stack email with SMTP / IMAP / POP3, a modern three-pane webmail, an admin dashboard, multi-tenancy, DKIM, anti-spam and 2FA. Zero native dependencies, one SQLite file, up and running in minutes.

thehijacker / hmelj

Self-hosted webmail client for IMAP/SMTP, Microsoft 365 and Exchange. Multi-account, multi-user, PWA + Android app.