MailerQ is a high performance Mail Transfer Agent (MTA) and a very fast SMTP server, designed for delivering large volume emai ...

SSMTP is a program which delivers email from a local computer to a configured mailhost (mailhub). It is not a mail server (lik ...

Haraka is an open source SMTP server written in Node.js which provides extremely high performance coupled with a flexible plug ...

Portable, extendable, zero-config email server for JVM and Ruby.

1. Portable Just copy and run. Only dependency is Java. Need to ...

* NEW PRICING MODEL * FREE VERSION This is the big news we want to bring to the commercial MTA arena: a version of our MTA wit ...

PowerMTA is an “enterprise” grade infrastructure application for email built to address the challenges of critical digital mes ...

Available in Windows and Windows Server via the optional IIS role. Configure SMTP e-mail in IIS when you want to deliver e-mai ...

Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, i ...

MailHog - Web and API based SMTP testing

It's an SMTP server written in Go, for the purpose of receiving large volumes of email. It started as a project for GuerrillaM ...

esmtp is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail compatible syntax. It's based on libESMTP su ...

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, ...

In the default mode, it transmits a mail to an SMTP server (for example at a free mail provider) which takes care of further d ...

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Inter ...

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard exte ...