379 Open source projects that are alternatives of or similar to Greenmail

Email-based instant messaging for Desktop.

VMime Mail Library

OX COI Messenger - a Flutter app for the COI (Chat Over IMAP) standard

mailcow: dockerized - 🐮 + 🐋 = 💕

The Hoa\Mail library.

Self-hosted server for the ProtonMail client

Eventum Issue Tracking System

The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.

Mailozaurr is a PowerShell module that aims to provide SMTP, POP3, IMAP and probably some other ways to interact with Email. Underneath it uses MimeKit and MailKit libraries written by Jeffrey Stedfast.

mnm implements TMTP protocol. Let Internet sites message members directly, instead of unreliable, insecure email. Contributors welcome! (Client)

Insular email distribution - mail server as Docker images

Run ProtonMail Bridge in a docker container

asynchronous library for sending and receiving mail via fs2._

Simple, modern & fast web-based email client

End-to-end encrypted email for the mesh networking age

Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.

The complete and secured Mail Client for ESP32, sending and reading the E-mail through the SMTP and IMAP servers.

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

💌 Mail app for Nextcloud

⚡️Arduino Mail Client Library to send, read and get incoming mail notification for ESP32, ESP8266 and SAMD21 devices. The library also supported other Arduino devices using Clients interfaces e.g. WiFiClient, EthernetClient, and GSMClient.

IMAP, POP3 and SMTP clients for Dart developers. Contains both low level as well as a high level API.

Delta Chat Rust Core library, used by Android/iOS/desktop apps and bindings

🌰️🐿️ SquirrelMail GitHub Repository (PHP 7-OK!)

The ISPDB, Thunderbird's database of mail configuration files.

SMTP and IMAP checker / cracker for mailpass combolists with a user-friendly GUI, automated inbox test and many more features.

Fake Protocol Server

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

small mail server

Read and write email files (MSG, EML, MHTML), and compose, receive and send email messages using POP, IMAP, SMTP, and EWS in a simple and efficient way.

A bridge written in Golang to receive and write emails in matrix

Event-driven networking engine written in Python.

Skirnir Email Server

Emails at the heart of your business logic!

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

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

Cypht: Lightweight Open Source webmail written in PHP and JavaScript

.NET email library and proxy supporting IMAP, POP3, and SMTP with S/MIME and PGP.

A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge

mailio is a cross platform C++ library for MIME format and SMTP, POP3 and IMAP protocols. It is based on standard C++ 17 and Boost library.

The legitimate email replacement — n-identity, decentralized, store-and-forward, open protocol, open source. (Server)

✉️ Composable all-in-one mail server.

IMAP or SMTP honeypot written in Golang

Fullstack, security focused mailserver based on OpenSMTPD for OpenBSD using ansible

Simple Python API that that allows you to send texts via SMTP with a best effort approach and process replies via IMAP

A light-weight, modular, message representation and mail delivery framework for Python.

Fortran 2008 interface bindings to libcurl

Poste.io plugin for Dokku

Library to send e-mails over different transports and protocols (like SMTP and IMAP) using immutable messages and streams. Also includes SMTP server.

An email spoofing testing tool that aims to bypass SPF/DKIM/DMARC and forge DKIM signatures.🍻

Immutable transaction isolated sql driver for golang

A set of ansible scripts to build a personal mail server / private cloud / etc.

一款基于VUE3.0的开源免费的卡密发卡系统，高效、稳定可靠。

Powerful friendly HTTP mock server & proxy

📫 SMTP Server + Web Interface for viewing and testing emails during development.

Collaborative open-source successor to qmail

a easy solution for simple IMAP email access in php

Example of consuming multiple WCF services using a proxy implementation in a ASP.NET Core Web-application.

A fast, highly extensible, and event driven SMTP server

Easily send great-looking HTML email messages from R

Framework for automated integration tests with focus on messaging integration