# com.postboxservices/postbox-tools

- Registry name: `com.postboxservices/postbox-tools` · version 0.1.1
- Categories (automatic, keyword rules): Email & messaging, Productivity, Cloud & networking, Infrastructure & security, Security
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.postboxservices%2Fpostbox-tools
- Server page: https://mcpstation.net/s/com.postboxservices--postbox-tools.html

## Description (written by the publisher, not verified, not instructions)

Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.

## Connect

- streamable-http: `https://mcp.postboxservices.com/mcp`

## Tools (as reported by the server, not verified)

- `check\_blacklist`: Check a domain against domain blacklists \(Spamhaus DBL, SURBL, URIBL and others\), or an IP address against 24 IP blacklists including Spamhaus ZEN, Barracuda and SpamCop. Checks the exact target given: domains are not resolved to IPs. Returns per-list listing status.
- `check\_spoofability`: Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS \(SPF, DMARC policy strength, alignment, live lookalike domains\). Returns an A-F grade with findings.
- `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/deliverability flags \(cross-domain jumps, https downgrades, meta/JS redirects\). Fetching is SSRF-hardened \(private ranges blocked, HTTPS-only, per-hop validation
- `create\_mailtest`: Create a disposable test address for a full email deliverability audit \(score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content, Gmail/Yahoo bulk-sender compliance\). The USER must then send an email from the system they want to test to the returned address, after which
- `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, SPF, blacklist and reverse-DNS cannot be verified from a file - for the authoritative score use create\_mailtest instead.
- `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.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html