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What is Haraka?

Haraka excels in handling thousands of concurrent connections and is capable of processing a remarkable number of messages every second. Its development, rooted in asynchronous JavaScript, contributes to remarkable speed and efficiency for both Haraka and its plugins. With strong spam protection offered by various plugins, Haraka effectively operates as a filtering Mail Transfer Agent (MTA). It also serves as a Mail Submission Agent (MSA) on port 587, especially when paired with authentication and DKIM signing plugins. Unlike conventional mail servers such as Exchange or Postfix, Haraka is not intended to function as a mail storage system, Local Delivery Agent (LDA), or an IMAP server like Dovecot or Courier. Instead, it is frequently integrated with these systems to provide improved functionality. Haraka's built-in outbound mail delivery engine is designed for scalability, ensuring that messages intended for relaying through authentication plugins are efficiently processed and queued for delivery. Additionally, the plugin framework of Haraka facilitates easy extensions, making it a valuable supplement to traditional MTAs that may fall short in filtering capabilities, thereby improving the email management experience. This modular structure allows users to customize their email solutions to meet specific needs, ensuring flexibility in their configurations. In this way, Haraka not only enhances performance but also adapts to the diverse requirements of modern email systems.

What is Courier?

The Courier mail transfer agent (MTA) operates as an all-encompassing mail and groupware server that employs well-established protocols like ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. It provides a cohesive platform that offers various services, including ESMTP, IMAP, POP3, webmail, and mailing list options, enabling users to easily toggle specific features on or off based on their needs. Recently, the Courier mail server has rolled out essential web-based calendaring and scheduling tools within its webmail module, with intentions to develop more advanced groupware calendaring options in the near future. Importantly, the source code for the Courier mail server is crafted to compile across most POSIX-compliant operating systems that run on Linux or BSD-derived kernels, and it is also compatible with Solaris and AIX systems, assuming users employ the correct freeware add-on tools from Sun or IBM. The evolution of the Courier mail server is based on a synthesis of various interconnected projects that have shaped its present configuration, and it also integrates SMTP extensions designed to improve mailing list management capabilities. This makes Courier not just a flexible mail server, but also a valuable collaborative resource for users seeking efficient communication and organizational solutions. As the demand for integrated communication tools continues to grow, Courier is likely to expand its offerings to meet evolving user needs.

Media

Media

No images available

Integrations Supported

Aid4Mail
Debian
JavaScript
LDAP
Node.js

Integrations Supported

Aid4Mail
Debian
JavaScript
LDAP
Node.js

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Haraka

Company Website

haraka.github.io

Company Facts

Organization Name

Double Precision, Inc.

Date Founded

1995

Company Location

France

Company Website

www.courier-mta.org

Categories and Features

Categories and Features

Popular Alternatives

Popular Alternatives

Courier Reviews & Ratings

Courier

Double Precision, Inc.