mailX
Email deliverability toolkit for humans and AI agents
mailX is a free online toolkit for diagnosing and fixing email deliverability issues. It performs real-time DNS lookups, checks email authentication records (SPF, DKIM, DMARC), scans for blacklist listings, and tests SMTP servers. The tool is API and MCP-ready, making it usable by both humans and AI agents without requiring a signup.
Users enter a domain and mailX performs live DNS queries to analyze authentication records, mail server configuration, blacklist status, and deliverability factors, then returns actionable fixes
Developers, marketers, sales teams, founders, and agencies managing email deliverability and DNS configuration
Background.
- Status
- launched
- Business model
- free
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