email-infrastructure

Open-source transactional email API and self-hostable Resend alternative. SMTP, inbound mail, webhooks, and campaigns for developers.

Official Node.js, Python, and Go SDKs plus the primitive CLI for Primitive — email infrastructure for AI agents. Generated from the OpenAPI spec.

Ommicom Mail is a modern email delivery platform for sending transactional and marketing emails at scale. It provides reliable delivery, domain management, email tracking, and monitoring tools to help businesses manage their email infrastructure efficiently.

Open-source email & SMS infrastructure for AI agents. Programmatic inboxes, BullMQ queuing, webhook delivery, prompt injection detection, vector search. Self-hostable.

The API-first email infrastructure for developers. Built with Fastify, Next.js, and Supabase.

Resend-compatible, provider-portable email infrastructure you run in your own cloud account.

Production engineering runbooks, zero-cost email architecture, and infrastructure guides

Jekyll blog covering self-hosted infrastructure, automation workflows, systems administration, and SRE-focused documentation, migrated from a legacy Grav instance.

Communication infrastructure for autonomous agents: real inboxes, signed webhooks, and threaded conversations.

Coldrig — cold email infrastructure run entirely by your coding agent (Claude Code / Codex / Cursor / Cline). One token, 28 intent-level MCP + HTTP tools and an npm CLI: domain purchase, mailboxes, warmup, sequences, replies, deliverability guardrails. Free fault-injecting sandbox.

Top Email Delivery Platform (Opensource) 🌟 Star if you like it! 🌟

Complete email infrastructure with custom SMTP server, DNS integration, multi-domain routing, real-time delivery via SSE, retry mechanisms, and asynchronous processing. Built with Node.js, React, MongoDB, Redis, and Docker.

Homebrew tap for installing the official Dairo CLI — email infrastructure for AI agents

📧 Laravel email delivery app with Docker containerization and subscriber management

Classify SMTP rejections and deferrals into a category and an action you can act on

Cold email at scale — domain warmup, DNS config, deliverability monitoring, reply classification, sender rotation. Battle-tested across 22,000+ sends, 23 campaigns. TypeScript + Vitest (57 tests).

Source-available mail infrastructure for self-hosted and managed deployments.

👋 Arun Kumar — Full-Stack Developer | PHP/Laravel · Python · Docker | Building Sendpilots

A single email ingress that yields byte-identical IMAP-store fidelity AND a normalized agent event feed, correlated by a deterministic thread key so persona replies land in the human-visible thread.

Open-source, self-hosted Gmail email API for personal projects, internal tools, and low-volume apps.