Haraka is a highly scalable node.js email server with a modular plugin architecture. Haraka can serve thousands of concurrent connections and deliver thousands of messages per second. Haraka and plugins are written in asynchronous JS and are very fast. Haraka has very good spam protection (see plugins) and works well as a filtering MTA. It also works well as a MSA running on port 587 with auth and dkim_sign plugins enabled. 
 
Haraka has a scalable outbound mail delivery engine built in. Mail marked as relaying (such as via an auth plugin) is automatically queued for outbound delivery.

Haraka is a highly scalable node.js email server with a modular plugin architecture. Haraka can serve thousands of concurrent connections and deliver thousands of messages per second. Haraka and plugins are written in asynchronous JS and are very fast. Haraka has very good spam protection (see plugins) and works well as a filtering MTA. It also works well as a MSA running on port 587 with auth and dkim_sign plugins enabled.

Haraka - A fast, highly extensible, and event driven SMTP server

Mailu is a simple yet full-featured mail server as a set of Docker images. The project aims at providing people with an easily setup, easily maintained and full-featured mail server while not shipping proprietary software nor unrelated features often found in popular groupware.
 
Its features include: 
<ul>
<li>Standard email server, IMAP and IMAP+, SMTP and Submission</li>
<li>Advanced email features, aliases, domain aliases, custom routing</li>
<li>Web access, multiple Webmails and administration interface</li>
<li>User features, aliases, auto-reply, auto-forward, fetched accounts</li>
<li>Admin features, global admins, announcements, per-domain delegation, quotas</li>
<li>Security, enforced TLS, Letsencrypt!, outgoing DKIM, anti-virus scanner</li>
<li>Antispam, auto-learn, greylisting, DMARC and SPF</li>
<li>Freedom, all FOSS components, no tracker included</li>
</ul>

Mailu is a simple yet full-featured mail server as a set of Docker images. The project aims at providing people with an easily setup, easily maintained and full-featured mail server while not shipping proprietary software nor unrelated features often found in popular groupware.

Mailu - Mail server as a set of Docker images

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. Mail-in-a-Box lets you become your own mail service provider in a few easy steps. It’s sort of like making your own gmail, but one you control from top to bottom. Technically, Mail-in-a-Box turns a fresh cloud computer into a working mail server. But you don’t need to be a technology expert to set it up.

Mail-in-a-Box - One click easy-to-deploy SMTP server

iRedMail is a fully fledged, full-featured mail server solution. It uses open source packages like Postfix, Dovecot, Apache, MySQL, OpenLDAP, Amavisd, RoundCube etc to provide this solution. 

IRedMail - Free, Open Source Email Server Solution for Linux

JES is a multi-featured hybrid MTA/MDA server written in the java programming language. It supports TLS, SSL, SMTP authentication, spam control and lot more. 

Java Email Server

C# Email Server (CES). Implements SMTP and POP3 components that can be used as a standalone server or as components in other applications. It is a port of the Java Email Server (JES). This component allows a program to accept incoming emails and process them using user defined logic.

C# Email Server - SMTP and POP3 Email Server in CSharp

CRSMail a 100% JAVA based E-Mail server. It supports SMTP, POP3, Plugins, Can listen on multiple ports, Log's everything to a log file etc.

CRSMail - JAVA based E-Mail server

Discover open source projects across all platforms

Projects

Haraka - A fast, highly extensible, and event driven SMTP server

Mailu - Mail server as a set of Docker images

Mail-in-a-Box - One click easy-to-deploy SMTP server

IRedMail - Free, Open Source Email Server Solution for Linux

Java Email Server

C# Email Server - SMTP and POP3 Email Server in CSharp

CRSMail - JAVA based E-Mail server

TechStack

Tagcloud

License

Suggested keywords:

Projects

Haraka - A fast, highly extensible, and event driven SMTP server

Mailu - Mail server as a set of Docker images

Mail-in-a-Box - One click easy-to-deploy SMTP server

IRedMail - Free, Open Source Email Server Solution for Linux

Java Email Server

C# Email Server - SMTP and POP3 Email Server in CSharp

CRSMail - JAVA based E-Mail server

TechStack

Tagcloud

License