AptLynxMCP server
Email Deliverability Checker
io.github.kryptoscan/email-deliverability-mcp
Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools
Check SPF, DKIM, DMARC, blocklists, reverse DNS and email headers against Gmail/Yahoo sender rules.
Working at last checkAbout 534 tokens per request once connected3 tools
https://api.ownmailserver.com/tools/mcp
At a glance
- Type
- MCP server
- Publisher
- Not verified
- Status
- Working at last check
- Tools
- 3
- Token cost
- About 534 tokens per request
- Sets up in
- Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
- Last checked
- 26 Oct 2026, 08:29 UTC
Connect it to your agent
Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.
Claude Code
claude mcp add --transport http email-deliverability-mcp https://api.ownmailserver.com/tools/mcp
Claude Desktop
Settings → Connectors → Add custom connector, and paste the URL.
Codex (config.toml)
[mcp_servers.email-deliverability-mcp] url = "https://api.ownmailserver.com/tools/mcp"
Gemini CLI
{"mcpServers":{"email-deliverability-mcp":{"httpUrl":"https://api.ownmailserver.com/tools/mcp"}}}
Cursor
{"mcpServers":{"email-deliverability-mcp":{"url":"https://api.ownmailserver.com/tools/mcp"}}}
VS Code
{"servers":{"email-deliverability-mcp":{"type":"http","url":"https://api.ownmailserver.com/tools/mcp"}}}
Antigravity
agy mcp add email-deliverability-mcp https://api.ownmailserver.com/tools/mcp
ChatGPT
Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.
OpenAI API (Responses tools)
{"type":"mcp","server_label":"email-deliverability-mcp","server_url":"https://api.ownmailserver.com/tools/mcp","require_approval":"always"}
Grok (xAI API tools)
{"type":"mcp","server_label":"email-deliverability-mcp","server_url":"https://api.ownmailserver.com/tools/mcp"}
Tools
check_domain~212 tokens
Check a domain's SPF (including the 10-DNS-lookup limit), DMARC policy and reporting, DKIM keys on common selectors, and MX records. Returns problems ranked by severity with the fix for each, plus the email services the domain uses.check_email_headers~174 tokens
Check a received email's headers against Gmail's and Yahoo's bulk sender requirements: SPF, DKIM and DMARC results, From domain alignment, one-click unsubscribe (and whether DKIM covers it), TLS, reverse DNS and Message-ID. Use the full headers as the recipient got them (Gmail: Show original).check_sending_ip~148 tokens
Check a mail server's IP: reverse DNS (PTR) and whether it resolves back to the IP, and listings on Spamhaus ZEN, Barracuda, SpamCop, PSBL, Mailspike and UCEPROTECT level 1. A refused Spamhaus query is reported as unknown, never as a listing.
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Badge for your README
[](https://aptlynx.net/servers/io.github.kryptoscan/email-deliverability-mcp)
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