Self-hosted by design
Customers deploy the control plane, workers, and KumoMTA on infrastructure they control. Data residency and IP reputation stay with the operator.
Product
Product
Letterry is licensed, self-hosted enterprise email infrastructure for a single organization install.
Delivery semantics
sent is the primary success signal. delivered is recorded only with evidence. Soft bounces are not suppressions; hard bounces and complaints are.
Operator console
Day-two operations for domains, mailboxes, broadcasts, reputation hooks, and audit — built as a real console, not a demo.
Modules
Mailbox store, catch-all ingest, and marketing workflows can be enabled per deployment needs.