Postbox Services: Email Deliverability & Security Tools

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.