KumoMTA

KumoMTA

Kumo Corp
lfr

lfr

Anonyfox
+
+

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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.

About

lfr is self-hosted mail-server and newsletter software packaged as a single Go binary for Linux and macOS servers. It lets developers, self-hosters, and small teams host mailboxes for their domains, manage aliases and forwarding, search and reply to messages, and configure domain mail records. Newsletter tools support double-opt-in signup lists, Markdown-based issues, hosted archives and signup websites, one-click unsubscribe, bounce and complaint handling, and delivery through a configurable SMTP relay when direct sending is unavailable. The command-line interface runs locally or over SSH, with setup and diagnostic commands for server, DNS, and mail delivery tasks. lfr is distributed under the MIT license; the software itself is free, while users arrange and pay for their own server and any optional relay service.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

KumoMTA is best suited for enterprises, email service providers, MailOps teams, high-volume senders, infrastructure teams, deliverability teams, SaaS companies, marketing platforms, and organizations that need open source email infrastructure, MTA software, high-volume message delivery, deployment control, cost predictability, migration support, documentation, and transparent email operations

Audience

Developers, self-hosters and small teams who want to run their own mail server and newsletters

Support

Phone Support Supported
24/7 Live Support Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

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

Pricing

$0
The software is free and MIT-licensed. Users provide their own server; optional SMTP relay services are billed separately by their providers.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

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

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:

Review this Software

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 Supported
Webinars Supported
Live Online Supported
In Person Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Kumo Corp
Founded: 2023
United States
kumomta.com

Company Information

Anonyfox
Germany
lfr.email/

Alternatives

Alternatives

No Alternatives
PowerMTA

PowerMTA

Bird
XgenPlus

XgenPlus

Data Ingenious Global Limited

Categories

Email Management Supported
Mail Servers Supported

Categories

Mail Servers Supported

Email Management Features

Data Recovery Not Supported
Email Archiving Supported
Email Deletion Not Supported
Email Discovery Not Supported
Email Monitoring Supported
Email Recall Not Supported
Queue Manager Supported
Response Management Not Supported
Routing Supported
Shared Inboxes Not Supported
Signature Management Not Supported
Spam Blocker Not Supported
Whitelisting / Blacklisting Supported

Integrations

Amazon SES Not Supported
Ongage Supported
Postmastery Supported
Prometheus Supported
SMTP2GO Not Supported

Integrations

Amazon SES Supported
Ongage Not Supported
Postmastery Not Supported
Prometheus Not Supported
SMTP2GO Supported
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