KumoMTA is architected for the performance needed by enterprise senders, with support for technologies including webhooks, AMQP, Kafka, Vault, Prometheus, Grafana, and direct database access.
AppSignal — Full-stack monitoring for errors, metrics, and logs
Full-stack monitoring for errors, metrics, and logs
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KumoMTA is the best choice for high-volume senders who want to be free from the restrictive commercial licensing provided by commercial MTAs, or who want the speed and flexibility not provided by other Open-Source MTAs.
We've been using Kumo MTA for six months now, and it's hands-down the best MTA out there. It's open-source, super customizable, and insanely high-performance. Plus, it's very stable and comes with complete and clear documentation. The team behind Kumo knows their stuff—everything about it is well-designed and can handle pretty much any email situation from a simple single-tenant installation sending a few thousand transactional emails a month to large scale distributed multi-tenant ESPs with complex shaping, sending and throttling rules sending millions of messages a day.
AhaSend