Claude Connector

Postbox Services: Email Deliverability & Security Tools

Ask your AI: is my domain or IP blacklisted? Run a spam test, check SPF/DKIM/DMARC, grade spoofing, trace redirects, look up domain age & WHOIS. Live checks, not guesses - free, no account.

View in the Claude registry

Brand: Postbox Services

Category: Security
Primary Subcategory: Email Deliverability & Validation

Integration details

Description

Claude can run real email deliverability and security checks on demand. Ask the questions people actually type (about blacklists, email spam tests, link tracing) and get answers from a live check, each with a link to the full report: - "Is my IP blacklisted?" / "Am I on a blacklist?" - check any IP against 24 DNSBLs (Spamhaus ZEN, Barracuda, SpamCop and more). - "Is my domain blacklisted?" - check a domain against the domain blacklists (Spamhaus DBL, SURBL, URIBL). - "Can someone spoof my domain?" - grade spoofing / BEC exposure A-F from SPF, DKIM and DMARC. - "Why did my email go to spam?" / "Run a spam test" - a full deliverability audit (SPF, DKIM, DMARC alignment, blacklists, reverse DNS, content) on a real message you send. - "Why did this email bounce?" - analyze a raw .eml file's headers and content. - "Where does this link really go?" - trace a URL through every redirect hop to its true destination, with phishing flags. - "How old is this domain?" and "Who owns it?" - domain age and WHOIS.

Integration type: Connector
Verification status: Community connector
Platform: Claude
Category: Security
Primary Subcategory: Email Deliverability & Validation
Secondary Subcategories: None listed
Brand: Postbox Services
Access: No account required
First tracked: 2026-09-28
Tool count: 8
Market: US

Agent DiscoverabilityClaude Discoverability Score

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Primary Subcategory

Competing in Claude Email Deliverability & Validation

View Category

0 scoredVerified connectors by score · Community connectors A–Z

Primary Subcategory

—AllegrowPending VerificationGet notified

—BillionVerifyPending VerificationGet notified

—Bouncer Email Verification MCP ServerPending VerificationGet notified

—Easy Email VerificationPending VerificationGet notified

—Email Spam TesterPending VerificationGet notified

—Email VerifyPending VerificationGet notified

—EmailVerifyPending VerificationGet notified

—FairValidPending VerificationGet notified

—Giggal.aiPending VerificationGet notified

—Inbox Monster MCPPending VerificationGet notified

—InboxTruePending VerificationGet notified

—MailerSendPending VerificationGet notified

—mailflossPending VerificationGet notified

—mailXPending VerificationGet notified

—MyEmailVerifierPending VerificationGet notified

—PingValidPending VerificationGet notified

—Postbox Services: Email Deliverability & Security ToolsPending VerificationGet notified

—QualisendPending VerificationGet notified

—ReachStream Email VerifierPending VerificationGet notified

—ReckonPending VerificationGet notified

—SMTPing Email VerifierPending VerificationGet notified

—VerifyAnyEmailPending VerificationGet notified

—ZeroBounce OfficialPending VerificationGet notified

—Zovo DNS CheckerPending VerificationGet notified

Tools

8 tools agents can invoke

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.
analyze_eml
Get a domain's registration date and age (young domains have weak sending reputation).
get_domain_age
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_blacklist
Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.
get_mailtest_result
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.
check_spoofability
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 returns the score.
create_mailtest
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); how it works: https://redirect.postboxservices.com/
trace_redirect
WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags.
whois_lookup

FAQs

Postbox Services: Email Deliverability & Security Tools Claude Connector FAQ

How the directory, categories and Discoverability Score work.

Read the methodology

How do I improve Postbox Services: Email Deliverability & Security Tools's Claude Connector discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are Postbox Services: Email Deliverability & Security Tools alternatives on Claude?

As of 2026-11-03, Postbox Services: Email Deliverability & Security Tools competes with Allegrow, BillionVerify, Bouncer Email Verification MCP Server, Easy Email Verification, Email Spam Tester, Email Verify, EmailVerify, FairValid and 15 more in Claude Email Deliverability & Validation, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.