curl / curl
A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTSP, SCP, SFTP, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
docker-mailserver / docker-mailserver
Containerized full-stack mail server bundling Postfix, Dovecot, Rspamd, and ClamAV for SMTP, IMAP, and POP3 with config-file-based setup.
Mailu / Mailu
Insular email distribution - mail server as Docker images
stalwartlabs / stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
axllent / mailpit
An email and SMTP testing tool with API for developers
jstedfast / MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP.
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
neomutt / neomutt
✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat
inbucket / inbucket
Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.
zone-eu / wildduck
Opinionated email server
cypht-org / cypht
Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)
simonrob / email-oauth2-proxy
An IMAP/POP/SMTP proxy that transparently adds OAuth 2.0 authentication for email clients that don't support this method. Keep legacy email clients working with Exchange Online, Gmail and other providers.
dovecot / core
Dovecot mail server
mguessan / davmail
DavMail POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 Gateway - Synced with main subversion repository at
greenmail-mail-test / greenmail
Official master for the Greenmail project
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.
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.
SirLouen / pecl-mail-imap
An extension to operate with the IMAP protocol, as well as the NNTP, POP3, and local mailbox access methods.
konpop381-commits / riichi-score-trainer
Riichi Mahjong Score Trainer 2026: Open-Source Calculator and Hand Efficiency Practice Tool