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mcp/harbor
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SpamFixer Email Deliverability Check MCP

v1.0.0 changelog · 1

com.spamfixer/email-deliverability-check

Why do a domain's emails go to spam? Checks SPF, DKIM, DMARC, MX and blocklists. Free, no login.

transport:streamable-http tools:1
Website

Target client

run in your project directory 

claude mcp add --transport http email-deliverability-check https://spamfixer.com/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

check_email_deliverability Read-only

check email deliverability

All 1 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.