A Resend alternative you host yourself, on your own Amazon SES — one container, one Postgres, no Redis. What's different: setup does the AWS work for you (a one-click CloudFormation stack, keys never leave your account) and writes DKIM/SPF/DMARC to Cloudflare. Then it's the API you already know: typed SDK with React Email, CLI, SMTP relay on 587, an MCP server for agents, campaigns, signed webhooks. AWS bills delivery at cost; we never mark it up. FSL source, MIT SDK.