echo.email Deliverability Test for ChatGPT

email.echo/deliverability

Send a test email, get SPF, DKIM, DMARC, TLS and IPv6 results plus sender rules. No key.

client:ChatGPT transport:streamable-http tools:3

Install echo.email Deliverability Test in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.echo.email/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs