SMTP Servers

Postfix

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It is used for lo…

Exim

Exim is one of the most widely used open-source email servers, which allows you to receive, send, …

sSMTP

sSMTP is an open source project on GitHub that provides a simple way to send mail using SMTP. It i…

Sendmail

Sendmail is a general purpose internetwork email routing facility that supports many kinds of elec…

iRedMail

Iredmail is a fully-featured, free email server solution based on the popular and well-established…

msmtp

msmtp is a free and open source SMTP client (email) messaging tool. It is a fully featured SMTP cl…

Microsoft Exchange Server

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft…

OpenSMTPD

OpenSMTPD is a free implementation of the server-side SMTP protocol as defined by the RFC 5321. Op…

hMail Server

hMailServer is a free e-mail server for Microsoft Windows. You can set up your own secure e-mail s…

PowerMTA

PowerMTA is a real-time, high-volume email delivery system which uses a single database to manage …

Mailinabox

Mailinabox is an open-source webmail and IMAP/SMTP server for use with mobile devices and desktop …

CMail

CMail is a free Windows command line mailer with advanced message formatting options.

blat

Blat is a small, efficent SMTP command line mailer for Windows. One of its main features is to syn…

mailcow

mailcow is a free, open source, multi-user mail transfer agent (MTA) suite that is designed to be …

sendEmail

dotconf.net is a new conference format that is similar to lightning talks: it's a short, 30-45 min…

mailsendgo

mailsend-go is a command line tool to send mail via SMTP protocol, written with golang. It include…

MailerQ

MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email…

Mailer

mailer is a free utility for sending emails from the command line. The email can be sent to any SM…

Haraka

Haraka is an open source SMTP server written in Node.js. It is designed to be simple, reliable, an…

Microsoft SMTP Server

Microsoft SMTP Server is a server application for IIS, this application is used to send e-mail mes…