OpenBSD Email Service

A Python Mail Server

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

The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.

A Lightweight High Performance ESMTP email server

SMTP server (library) for receiving emails, written in pure PHP.

Blackhole is an MTA written on top of asyncio, utilising async and await statements that dumps all mail it receives to /dev/null.

mxcheck is an info and security scanner for e-mail servers.

SQLite-backed mail processing suite

A Golang library for implementing RFC2821 SMTP servers

Gene's SMTP server — receive Internet mail with less fuss

Postmaster ESMTP server

Ansible role to install sendmail

A pytest fixture that creates an SMTP server.

A simple PHP wrapper for OpenBSD smtpd service to use in your web apps - PHP: <=8.1, GPL

A very basic simulation of a mail server storing mails received in an encrypted form. Originally developed as a mini project for Computer Networks, a subject taught in the 6th semester of B.E degree course in CS at PCCOE, Pune.

Simple SMTP daemon

Free SMTP Server

SMTP dual delivery relay (proxy) daemon, this allows testing of a new server side by side of a production server, optionally saving proxied email as eml files.