KumoMTA is an open-source Message Transfer Agent (MTA) designed for high-performance outbound email functionality, similar to commercial enterprise MTAs such as Momentum, PowerMTA, and Halon.
The KumoMTA project was founded by a group of email industry veterans with decades of experience building and managing high-performance On-Prem MTAs and is supported by a community of some of the largest senders in the world.
Because it is designed for high-performance sending environments, KumoMTA is for experienced email operations professionals who are accustomed to high-performance sending environments and familiar with DevOps practices.
Learn more in our FAQ and at https://kumomta.com/.
You can learn more about KumoMTA from the Documentation.
Real-time discussion is available on Our Discord.
If you are interested in contributing/extending KumoMTA, take a look at DEVELOPERS.md. The #devel channel on Our Discord is for contributors to discuss KumoMTA development.
See How to Report Bugs.
See How to Get Help. For paid support see https://kumomta.com/support.
You can subscribe to updates at https://kumomta.com/subscribe, we send updates periodically and will never sell nor share your information.
We're available to talk about the project, book us at https://cal.com/team/kumomta/talk-with-kumomta.
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