opensend.cc

opensend.cc is an open source email platform that you self-host on your own server. It sends through your own AWS account, so your domain, data, and sender reputation remain under your control. The platform provides a REST API and SDK, SMTP support, templates, broadcasts, automations, audiences, webhooks, and logs, and can be installed with a single command. It is Resend-compatible, so teams already using Resend can migrate by changing two lines of code.