KumoMTA

KumoMTA

Kumo Corp
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About

Halon reinvents email infrastructure for today’s fast-moving, high-volume world. Their solutions- Halon Engage, Halon Protect, and Halon Classify offer a fully composable platform that empowers you to define, control, and automate every aspect of your email infrastructure stack with intelligence built in. Ideal For: - Enterprises or platforms sending high volumes of transactional, marketing, or lifecycle emails - Email service providers (ESPs) looking for more control and agility - Teams who want real-time visibility, proactive delivery, and the ability to evolve on their own terms Benefits: - Develop features 10x faster - Reduce manual triage - Decrease traffic jams - Reduce escalations - Keep your email operations teams happier - Supercharge client satisfaction - Increase your top line and grow your business

About

KumoMTA is an Open-Source, enterprise-grade email message transfer agent (MTA) software for sending high-volume, business-critical emails. KumoMTA is typically chosen by high-volume email users looking to replace PowerMTA, Momentum, or traditional Open Source MTAs. KumoMTA offers high-performance message relay to the tune of millions of messages per hour per server, combined with extreme flexibility and configurability through its use of a Lua scripting engine for configuration and message management. For more information on KumoMTA see our Sourceforge project page.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Email service providers, Large volume email senders, Security solution for service providers

Audience

Email Service Providers, Large Volume Email Senders

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$0
KumoMTA is Open-Source and free to use, those interested in support and services can contact us.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Reviews/Ratings

Overall 5.0 / 5
ease 4.5 / 5
features 5.0 / 5
design 3.8 / 5
support 4.8 / 5

Pros & Cons from Real Users

Pros

  • KumoMTA has easily the best documentation that I have ever read. It is super customizable because of the Lua scripting and if you ever get stuck, there's a great community that will help you out. Features like webhooks are a blessing and once everything works, it works amazingly well.
  • High performance, extremely stable, and open-source, giving enterprises more options.I replaced Momentum with KumoMTA, which saved me a significant amount of costs. Moreover, Momentum’s support has been getting worse.
  • There's a lot to like with Kumo: easy to spin up instances, easy to scale instances, lightweight, great webhook/event support, and their community is kind so any questions I have get answered quickly in their Discord.
  • I love how quick and easy it is to setup KumoMTA. It gives you total control over every part of the message delivery which helps you to transform and even fix messages that don’t follow RFC standards. The configuration system is easy to use. It's extremely flexible, thanks to its Lua scripting module. Well documented, scales beautiful. The webhook (logging) system is also great which makes collecting analytics and statistics really simple. I really appreciate the level of personal support that I receive and I am truly grateful for it. In the past, I had a small feature request which was quickly incorporated into the software in under 24 hours.

Cons

  • It's a lot to take in, knowledge about email is mandatory. Examples in docs could be improved.
  • Configuration items lack real, effective examples and guidance on how to better implement certain features, methods, and so on. Out-of-the-box configurations are limited; this part could actually be developed into a marketplace to enable community participation in co-creation.
  • There's no UI/frontend so it's very much for devs. This is fine because we built our own MTA monitoring software.
  • There's a bit of learning curve at the start, especially for those new to Lua, but this is true for every software/MTA. Apart from that, my experience with KumoMTA has been smooth sailing.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Halon
Founded: 2000
Sweden
halon.io

Company Information

Kumo Corp
Founded: 2023
United States
kumomta.com

Alternatives

KumoMTA

KumoMTA

Kumo Corp

Alternatives

Axigen

Axigen

Axigen Messaging
PowerMTA

PowerMTA

Bird
Apache James

Apache James

The Apache Software Foundation

Categories

Categories

Email Management Features

Data Recovery
Email Archiving
Email Deletion
Email Discovery
Email Monitoring
Email Recall
Queue Manager
Response Management
Routing
Shared Inboxes
Signature Management
Spam Blocker
Whitelisting / Blacklisting

Integrations

Ongage
Postmastery
Prometheus

Integrations

Ongage
Postmastery
Prometheus
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