Hyvor Relay — self-hosted email API

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Hyvor Relay is a self-hosted, open-source email API for developers: it sends emails over SMTP through your own infrastructure. Reach for it when you need to send transactional and bulk emails from your apps using your own servers, without depending on an external mailing service: a convenient sending API, simple self-hosting, and management and observability designed for millions of emails per day. Its focus is your own email API/sender on your own infrastructure (SMTP), not a ready marketing platform with an email editor and segments or a cloud service like SendGrid/Resend: the value is controlling email delivery and volumes yourself. In job it sits alongside BillionMail/useSend and similar self-hosted email solutions, with the emphasis on a simple developer email API and large-scale sending. It suits teams that need their own reliable email sending via API without being tied to an external provider.