# Relay

> Reliable email sending and automation with developer friendly APIs

- Canonical URL: https://www.fosshunter.com/tools/relay
- JSON export: https://www.fosshunter.com/tools/relay.json
- Website: https://github.com/hyvor/relay
- Category: Email SMTP
- Open source: yes
- Self-hostable: unknown
- Verified listing: no
- Featured: no
- Published at: 2026-03-31T20:15:30+00:00
- Catalog revision: `586943998`

## Repository metrics (point-in-time)

- Repository: https://github.com/hyvor/relay
- Stars: 920
- Forks: 65
- Open issues: 54
- License: AGPL-3.0
- Last push: 2026-11-03T08:06:48+00:00
- Metrics observed at (synced_at): 2026-11-03T17:56:40+00:00
- Archived: no

Tags: email, Notifications, Emal SMTP
Tech stacks: go, golang, javascript, php, typescript

## Features
- Self‑hosted open‑source email API for developers as an alternative to SES/Mailgun/SendGrid *(highlighted)*
- REST API with email sending, domain & webhook management *(highlighted)*
- Built‑in DNS automation, bounce/feedback handling, and observability support *(highlighted)*

## Description

Relay is a modern email sending platform with APIs for automation, notifications, and transactional emails. Built for developers to send, track, and manage emails reliably at scale.

---
Source: [FOSSHunter — Relay](https://www.fosshunter.com/tools/relay) — cite `synced_at` and the catalog revision when quoting metrics.
Interpretation rules: https://www.fosshunter.com/llms-full.txt