KitScout

Categories › Communication › Email

com.postboxservices/postbox-tools

MCP serverVerified domain · postboxservices.comRemote● LiveFree to try

Free email checks: 24 blacklists, spoofing grade, redirects, spam test, WHOIS, BIMI, AI readiness.

Install

Remote server: your requests and data go to mcp.postboxservices.com. Claude Code: claude mcp add --transport http postbox-tools https://mcp.postboxservices.com/mcp · Claude app: Settings → Connectors → Add custom connector.

What it can do

The tools this server listed when we connected to it, in its own words.

  • check_blacklist — Check a domain against domain blacklists (Spamhaus DBL, SURBL, URIBL and others), or an IP address against 24 IP blacklists including Spamha
  • check_spoofability — Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS (SPF, DMARC policy strength, alignment, l
  • trace_redirect — Follow a URL server-side through every HTTP redirect hop to its real final destination - per-hop status, IP, TLS and timing, plus phishing/d
  • create_mailtest — Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, Sp
  • get_mailtest_result — Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.
  • analyze_eml — Run a deliverability/content analysis on a raw RFC 822 email (.eml source: full headers + body). IMPORTANT LIMITS: with no live SMTP session
  • get_domain_age — Get a domain's registration date and age (young domains have weak sending reputation).
  • whois_lookup — WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags.
  • check_bimi — Check a domain's BIMI setup: looks up the default._bimi TXT record, fetches the logo it points to (l=) and validates the SVG against the BIM
  • check_ai_discoverability — Grade how discoverable a website is to AI answer engines (ChatGPT search, Perplexity, Claude, Google AI Overviews, Copilot and others) from

KitScout test notes

Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.

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