MailCheap

This platform changes traditional email pricing by charging based on send volume rather than total subscriber count. Newsletter operators no longer pay penalizing fees for keeping dormant readers on their lists. Built-in automation automatically identifies inactive subscribers, attempts re-engagement, and stops sending to them to protect your deliverability.

Designed with an AI-first infrastructure, the tool connects directly with agents like Claude, ChatGPT, Grok, and Cursor via MCP protocols and API keys. You can instruct your AI agent to draft upcoming issues, schedule publication dates, review campaign analytics, or import contact lists. To protect your brand, agents always require your manual approval before sending an issue live.

Every account includes automated sender authentication with DKIM, SPF, and DMARC, alongside stepped campaign warmups for new audiences. Your deliverability stays protected through automatic filtering of spam traps and typo-laden addresses during imports.

Key features include:

• Usage-based billing so you only pay for delivered emails.

• Open-source transparency allowing self-hosting or code audits.

• Agentic newsletter controls for drafting and sending with AI.

• Zero forced branding on every tier, keeping emails strictly yours.