Top 201 smtp open source projects

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

Golang SMTP server

An elegant MIME/SMTP email library with support for attachments

Swaks - Swiss Army Knife for SMTP

Insular email distribution - mail server as Docker images

Magento 2 SMTP Extension helps the owner of store simply install SMTP (Simple Mail Transfer Protocol) server which transmits the messages into codes or numbers.

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

Fast Advanced Spam Analysis Tool

VMime Mail Library

Makes sending emails easy and DRY — For Python 3.

Lightweight SMTP client written in Go

✉️ Composable all-in-one mail server.

A reimplementation of the Python stdlib smtpd.py based on asyncio.

Golang package that generates clean, responsive HTML e-mails for sending transactional mail

Top geek's chindogu - personal assistant over satellite/telephone/SMS/chatbot, plus web infrastructure servers (web & mail, ad-free DNS, web proxy, SNMP, etc)

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

📩🛡 Email privacy. Anonymously send and receive with alias forwarding.

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

A Lightweight High Performance ESMTP email server

mailproxy is a simple SMTP proxy. It receives emails through an unencrypted, unauthenticated SMTP interface and retransmits them through a remote SMTP server that requires modern features such as encryption and/or authentication. mailproxy is primarily useful for enabling email functionality in legacy software that only supports plain SMTP.

Send email in Python conveniently for gmail using yagmail

Simple SMTP server / postfix null relay host for your Docker and Kubernetes containers. Based on Alpine Linux.

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)

Mini SMTP server written in golang

Swift SMTP client

✅ A Go library for email verification without sending any emails.

The best free email forwarding for custom domains. Visit our website to get started (SMTP server)

mailing lists - the unix way

Papercut SMTP -- The Simple Desktop Email Server

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.

An SMTP library written in C++ for Qt. Allows applications to send emails (MIME with text, html, attachments, inline files, etc.) via SMTP. Supports SSL and SMTP authentication.

Recoded version of Visual Studio Code extension 'vs-deploy', which provides commands to deploy files to one or more destinations.

✉️ A fully featured open source mail delivery platform for incoming & outgoing e-mail

All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.

qpsmtpd is a flexible smtpd daemon written in Perl

Send a notebook as an email

Visual Studio Code extension that provides commands to deploy files of a workspace to a destination.

Eventum Issue Tracking System

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.

An SMTP adapter for Bamboo.

Get a programmable email address. Automate what happens when you receive emails. It's like Zapier for devs who hate emails.

small python3 tool to check common vulnerabilities in SMTP servers

🌟 FastSitePHP 🌟 A Modern Open Source Framework for building High Performance Websites and API’s with PHP

MailMergeLib is a mail message client library which provides comfortable mail merge capabilities for text, inline images and attachments, as well as good throughput and fault tolerance for sending mail messages.

Mailway installer, host your own Mailway instance

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

netDumbster is a .Net Fake SMTP Server clone of the popular Dumbster

Very crude and poorly written HTTP(s) and SMTP bin

This tool generates gopher link for exploiting SSRF and gaining RCE in various servers

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

Emailing wrapper for Vapor 3 apps

Send email to any SMTP server like a boss, in Swift and cross-platform

A lightweight PHP SMTP mail sender

Object-Oriented Email Sending Java SDK

Next generation SMTP mailer plugin for WordPress. Trusted by over 100,000 sites.

Provides a clean and simple way to configure the WordPress-bundled PHPMailer library, allowing you to quickly get started sending mail through a local or cloud based service of your choice

Sendria (formerly MailTrap) is a SMTP server designed to run in your dev/test environment, that is designed to catch any email you or your application is sending, and display it in a web interface instead of sending to real world.

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

Check if an SMTP server accepts emails to a given address