Postbox Services
Email deliverability checks
Run live email deliverability and security checks from your AI and get answers from real lookups, each with a link to a full report. Check a domain or IP against email blacklists, grade a domain's spoofing and business email compromise exposure from SPF, DKIM and DMARC, and trace a link through every redirect to where it really goes.
MCP connector
- Server URL
https://mcp.postboxservices.com/mcp- Login
- None
- Protocol
- MCP 2025-11-25
- Instructions
Free email deliverability and security checks by Postbox Services: check whether a domain or IP is on an email blacklist (DNSBL), grade a domain's spoofing/BEC exposure (SPF, DKIM, DMARC), trace a URL's redirect chain, run a full deliverability/spam test on a real message, analyze a raw .eml, look up domain age and WHOIS, check a domain's BIMI record and logo, and grade a website's AI discoverability (robots.txt access for AI crawlers, sitemap, llms.txt). Each tool checks the exact target given and returns structured results plus a link to the full web report.
Tools
Reads data9
Changes data1
Skills
1 in the ChatGPT listing
Brevo#157