Hyvor Relay
Self-hostable email API for developers that sends transactional email over SMTP through the sender's own servers, with delivery logs, bounce handling and webhooks.
relay.hyvor.comrepositorydocspricing
Hyvor Relay is an email API for developers. An application sends a message to the API over REST, and the server delivers it over SMTP from the IP addresses and domains the operator configures. The server is a PHP API with Go workers, a built-in SMTP server, a DNS server and a webhook worker, shipped as one Docker image and started with Docker Compose or Docker Swarm. It keeps its data in PostgreSQL and signs administrators and users in through an external OpenID Connect provider. Bounces and complaints arrive on its SMTP server, and its DNS server manages the DNS records for the instance domain.
Worth knowing
The project offers an enterprise license beside the AGPL-3.0 license, and its own pages say both carry the same features. The official cloud instance is not open for public signups, according to the product docs. A self-hosted server needs a static IPv4 address, with more for additional queues, and accepts incoming mail on port 25.
Identity
Rendering and deploy
Releases
Adoption
Sources
- 2026-11-03: links, Categories, Content API
relay.hyvor.com - 2026-11-03: links, Maintainer, Maintained by, Written in, License, GitHub stars, Contributors
github.com/hyvor/relay - 2026-11-03: links
relay.hyvor.com/docs - 2026-11-03: links
relay.hyvor.com/pricing - 2026-11-03: Headquarters
hyvor.com/privacy - 2026-11-03: First release
github.com/hyvor/relay/releases/tag/0.0.1 - 2026-11-03: Runtime, License
github.com/hyvor/relay/blob/main/README.md - 2026-11-03: Runs as, Install with, Databases, Admin interface
relay.hyvor.com/hosting - 2026-11-03: Install with
relay.hyvor.com/hosting/deploy-easy - 2026-11-03: Current major version, Last release
github.com/hyvor/relay/releases/tag/0.0.48