200 Open source projects that are alternatives of or similar to Qpsmtpd

Emails at the heart of your business logic!

SMTP (email) server with a focus on simplicity, security, and ease of operation [mirror]

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

Exim Mail Transport Agent - source, testsuite and documentation

A SMTP Server component written in C#

Object-Oriented Email Sending Java SDK

Self-hosted server for the ProtonMail client

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

A fast, highly extensible, and event driven SMTP server

Getting App Store and Google Play's review and notify to either slack or email.

Catches mail and serves it through a dream.

Zmail makes it easier to send and retrieve emails in python3

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

Email-based instant messaging for Desktop.

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.

A Python Mail Server

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

SMTP docker container

An SMTP adapter for Bamboo.

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

TCP/UDP Applicaton for UNO/MEGA/STM32 using ESP8266's AT firmware.

mailcow: dockerized - 🐮 + 🐋 = 💕

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

Simple, modern & fast web-based email client

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

Functional HTML forms for Front-End Developers.

Emailing wrapper for Vapor 3 apps

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

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

💌 Mail app for Nextcloud

A lightweight PHP SMTP mail sender

Check if an email address exists without sending any email, written in Rust.

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.

High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

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

Computer Networking : Principles, Protocols and Practice (first and second edition, third edition is being written on https://github.com/cnp3/ebook)

Mailway installer, host your own Mailway instance

Event-driven networking engine written in Python.

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.

Validates regex, typos, disposable, dns and smtp

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

Official master for the Greenmail project

Check if an SMTP server accepts emails to a given address

A hosted disposable email telegram bot; Extremely privacy friendly; Proudly hosted for community.

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

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

Local, web-based mail server application. Slurp mails into oblivion!

Easily send great-looking HTML email messages from R

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

A PHP library for performing email addresses validation via SMTP

a mailer library for Rust

A protocol gateway for the Web.

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

Create custom SMTP servers on the fly

Send a notebook as an email

Eventum Issue Tracking System

small python3 tool to check common vulnerabilities in SMTP servers

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

📤 An SMTP client & server library written in Go