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What is KumoMTA?

KumoMTA is an open source email infrastructure platform designed for enterprises, email service providers, and high-volume senders that need scalable, transparent, and controllable MTA technology. The platform is built for organizations that want to own their email sending infrastructure rather than depend on closed commercial systems. KumoMTA emphasizes performance, with the ability to send tens of millions of messages per hour on a single instance. It is designed to provide the scalability and resilience needed for large-scale email operations without sacrificing visibility or control. Because the platform is open source, teams can inspect the code, understand how the system works, and maintain authority over their deployment. KumoMTA is positioned around long-term stability, cost predictability, fair pricing, operational control, and reduced exposure to vendor lock-in or surprise renewal changes. The platform is supported by a growing community of developers, security researchers, enterprises, and MailOps professionals who contribute to innovation, auditing, vulnerability identification, and ongoing improvement. KumoMTA provides extensive documentation, community resources, a GitHub repository, migration guidance, and support options for teams evaluating or replacing existing MTA infrastructure. Its resources include migration information for platforms such as Hurricane MTA, Momentum, PowerMTA, and SendGrid. The platform is built for teams that need confidence in their email architecture, predictable infrastructure decisions, and the ability to send at massive scale. By combining open source MTA technology, high-volume delivery, code transparency, community stewardship, enterprise support, documentation, and migration resources, KumoMTA helps organizations modernize email infrastructure while keeping control of their operations.

What is Eudora Internet Mail Server?

The restrictions on relay functionality have been completely revamped to include a more intuitive interface that enhances user control over security protocols associated with relays. In addition, EIMS has introduced a proprietary Domain Name Resolver (DNR) that aims to rectify the shortcomings of the Open Transport DNR and offers better performance than the OS X DNR, although it does not yet support non-recursive DNS configurations. A new feature has been added with the inclusion of an SMTP Submit port, which operates by default on TCP port 587, effectively replicating the capabilities of the traditional SMTP port and proving especially advantageous for users whose internet service providers impose limitations on port 25. Users can now set a cap on the number of recipients allowed per email, and the previously compulsory Expand SMTP Addresses feature can now be turned off, marking a significant shift from EIMS versions 3.1 and earlier where it could not be disabled. Moreover, the SMTP server on both ports 25 and 587 is now capable of logging Telnet connections and identifying behaviors similar to port scanning, which significantly bolsters security monitoring functions. Overall, these enhancements are designed to empower users with improved flexibility and security in their email management, thus adapting to contemporary needs. This comprehensive update reflects a commitment to evolving user demands and technological advancements in email services.

Media

Media

Integrations Supported

Ongage
Postmastery
Prometheus
TRANSEND

Integrations Supported

Ongage
Postmastery
Prometheus
TRANSEND

API Availability

Has API

API Availability

Has API

Pricing Information

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

Pricing Information

Free
Free Version
Free Trial Offered?

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

Kumo Corp

Date Founded

2023

Company Location

United States

Company Website

kumomta.com

Company Facts

Organization Name

Eudora Internet Mail Server

Company Website

www.eudora.co.nz/

Categories and Features

Email Management

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

Categories and Features

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