Haraka (software)

Haraka
DeveloperMatt Sergeant
ReleaseMay 2011
Stable release
3.3.5 Edit this on Wikidata / 17 October 2026; 11 days ago (17 October 2026)
Written inNode.js, JavaScript
Operating systemUnix-like, Windows
TypeMail transfer agent
LicenseMIT License
Websiteharaka.github.io
Repositorygithub.com/haraka/Haraka

Haraka is an open source SMTP server. Its architecture is plugin-oriented and event-driven. The server and its plugins are written in JavaScript using the Node.js framework.

Haraka follows a plugin model, implementing a very lightweight SMTP core and providing developers hooks into the mail flow. Almost all of Haraka's functionality is built as plugins.

Through its use of the V8 JavaScript engine and asynchronous I/O, the author claims the server is capable of handling thousands of messages per second.

Bounce.io announced that they regularly handle 2 to 5 thousand simultaneous SMTP connections with Haraka.

Typical Usage

Haraka is frequently used as a filtering MTA in front of other MTAs that lack the performance and/or filtering capabilities of Haraka. Craigslist uses Haraka to handle inbound and then forward validated connections to Postfix. Bounce.io similarly uses Haraka to accept incoming messages and deliver them to their application engine. Mail Toaster 6 uses Haraka similarly to accept incoming mail and forward to a qmail based message store.

Features

See also

References

  1. ↑ "Release 3.3.5". 17 October 2026. Retrieved 17 October 2026.
  2. ↑ "Haraka License". GitHub. Retrieved 14 February 2015.
  3. ↑ "Haraka Plugins". Haraka Source Code. GitHub. Retrieved 15 February 2015.
  4. ↑ "Haraka Language Statistics". Haraka Source Repository. GitHub. Retrieved 15 February 2015.
  5. ↑ "Haraka Manual » README". Archived from the original on 2017-10-28. Retrieved 2017-11-01.
  6. ↑ "Writing Haraka Plugins". Haraka Docs. GitHub. Archived from the original on 14 February 2015. Retrieved 15 February 2015.
  7. ↑ "Haraka Readme". Haraka. GitHub. Archived from the original on 28 October 2017. Retrieved 15 February 2015.
  8. ↑ "Tech Shoutout - Haraka at bounce.io". Bounce.io. Archived from the original on 15 February 2015. Retrieved 15 February 2015.
  9. ↑ "Craigslist Uses Haraka". Matt Sergeant. Archived from the original on 15 February 2015. Retrieved 15 February 2015.
  10. ↑ "About, Thanks". Craigslist. Retrieved 15 February 2015.
  11. ↑ "SMTP Haraka". Mail Toaster 6. tnpi.net. Archived from the original on 19 October 2014. Retrieved 15 February 2015.
  12. ↑ "auth_ldap". Haraka. Archived from the original on 15 February 2015. Retrieved 15 February 2015.
  13. ↑ "auth_vpopmaild". Haraka. Retrieved 15 February 2015.
  14. ↑ "access". Haraka. Retrieved 15 February 2015.