MailCheap
Deliver cost-effective newsletter campaigns and manage email subscribers using AI agent workflows, custom domains, and automated deliverability protections.
MailCheap is an open-source newsletter and email marketing platform designed to charge only for sent emails rather than dormant subscriber counts. Built for self-hosting with Amazon SES or PostShiba (as well as an available cloud version), it features deep Model Context Protocol (MCP) server support, enabling AI assistants like Claude, ChatGPT, and Cursor to draft, review, and dispatch campaigns alongside a rich web dashboard. MailCheap includes built-in deliverability features—such as progressive warmups, automatic dormant reader cleanup, spam/bounce limits, and Google Postmaster Tools monitoring—while automatically generating public web archives, RSS-friendly sitemaps, and custom domain configurations for every publication.