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KumoMTA

Take Control of Your Email Infrastructure

Free
Screenshot of KumoMTA

Description

KumoMTA is a robust Mail Transfer Agent (MTA) built to empower enterprise organizations with reliable, high-throughput email delivery. Released under the Apache 2 license, it offers a transparent and open-source approach, enabling businesses to break free from restrictive commercial licenses while leveraging a scalable and customizable email infrastructure solution.

Designed for large senders, KumoMTA allows seamless integration with modern technologies such as Docker, Kubernetes, and a rich Lua scripting engine. Its architecture supports advanced observability tools, direct database access, and horizontal scaling, making it ideal for managing complex MailOps environments and ensuring optimal deliverability.

Key Features

  • High Performance: Capable of sending millions of emails per hour on a single server
  • Horizontal Scalability: Easily scales across multiple servers with Docker and Kubernetes
  • Integration Flexibility: Supports Lua scripting, webhooks, AMQP, Kafka, and direct database access
  • Advanced Observability: Compatible with Prometheus and Grafana for monitoring
  • Open-Source Model: Released under Apache 2 license with transparent GitHub-hosted source code
  • Community Driven: Active community supporting and improving the tool continuously

Use Cases

  • Managing large-scale transactional or marketing email delivery
  • Upgrading or replacing legacy Mail Transfer Agents
  • Integrating with enterprise email delivery architectures
  • Optimizing deliverability in complex MailOps environments
  • Building custom email pipelines with modular scripting

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