Haraka alternatives and similar software solutions
Based on the "Mail Transfer Agents" category
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Haraka - a Node.js Mail Server
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 makes no attempt to be a mail store (like Exchange or Postfix/Exim/Qmail), a LDA, nor an IMAP server (like Dovecot or Courier). Haraka is typically used with such systems.
Haraka has a scalable outbound mail delivery engine built in. Mail
relaying (such as via an
auth plugin) is automatically
queued for outbound delivery.
- Join the mailing list (implemented as a Haraka plugin)
- Join us on IRC at
- GitHub Issues
Why Use Haraka?
Haraka's plugin architecture provides an easily extensible MTA that complements traditional MTAs that excel at managing mail stores but do not have sufficient filtering.
The plugin system makes it easy to code new features. A typical example
is providing qmail-like extended addresses to an Exchange system,
whereby you could receive mail as
email@example.com, and yet
still have it correctly routed to
firstname.lastname@example.org. This is a few lines of
code in Haraka.
# If the second command gives "nobody" errors, uncomment & run the next command # npm -g config set user root npm install -g Haraka
After installation, use the
haraka binary to set up the service.
First, create the service:
haraka -i /path/to/haraka_test
That creates the directory
directories within. It also sets the host name used by Haraka
to the output of
hostname is not correct, edit
config/host_list. For example,
to receive mail addressed to
domain.com to the
Finally, start Haraka using root permissions:
haraka -c /path/to/haraka_test
And it will run.
To choose which plugins run, edit
config/plugins. Plugins control the
overall behaviour of Haraka. By default, only messages to domains listed
config/host_list will be accepted and then delivered via the
smtp-forward plugin. Configure the destination in
Read the Fine Manual
haraka -h plugins/$name
The docs detail how each plugin is configured. After editing
config/plugins, restart Haraka and enjoy!
Running from git
If you are unable to use npm to install Haraka, you can run from git by following these steps:
First clone the repository:
$ git clone https://github.com/haraka/Haraka.git $ cd Haraka
Install Haraka's node.js dependencies locally:
$ npm install
config/smtp.ini to specify the plugins and
config you want.
Finally run Haraka:
$ node haraka.js
License and Author
Haraka is MIT licensed - see the LICENSE file for details.
*Note that all licence references and agreements mentioned in the Haraka README section above are relevant to that project's source code only.