{"uid":"cap_zpZHZkMUpqxv8ML2qznVR","slug":"spf-authorizes-postmark-84a803b0","name":"spf-authorizes-postmark","description":"Does the domain's SPF record authorise postmark to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for postmark's include/ip mechanisms, returning yes/no, the matching mechanism and the full record. Confirms a vendor integration is wired for deliverability, or spots an unexpected sender. $0.01 per lookup.","url":"https://email.intel.rallylive.ca/email/spf-authorizes/postmark?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sNHsdTKd1UWxFscAEPBm2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a domain's SPF record authorizes Postmark to send email on its behalf, returning yes/no, the matching mechanism, and the full SPF record.","exampleAgentPrompt":"Can you check whether acme.com's SPF record authorizes Postmark to send its email — I want to know the matching mechanism and see the full SPF record?","exampleUseCases":[{"title":"Verifying Postmark onboarding for new domain","prompt":"We just set up Postmark for sending transactional emails from our domain mybrand.io — can you confirm our SPF record is properly configured to authorize Postmark so our emails won't get rejected?"},{"title":"Auditing vendor email setup before launch","prompt":"Before we go live, can you check if notifications.partnerapp.com has Postmark listed in its SPF record and show me the full SPF record and which mechanism matches?"},{"title":"Investigating unexpected email sender","prompt":"I'm seeing emails from support.somecompany.com that claim to come through Postmark — can you verify whether their SPF record actually authorizes Postmark as a sender?"}],"resultDescription":"Returns a yes/no authorization flag indicating whether Postmark is included in the domain's SPF record, the specific SPF mechanism that matched (e.g. include:spf.mtasv.net), and the complete raw SPF TXT record retrieved via Cloudflare DoH.","failureModes":["Domain has no SPF TXT record — returns no authorization with empty record","Domain does not exist or DNS resolution fails — DNS error returned","SPF record is malformed or exceeds DNS lookup limit — parsing may fail","Rate limiting or Cloudflare DoH unavailability — service temporarily unavailable","No domain query parameter provided — request rejected with input validation error"],"whenToPreferThis":"Use this endpoint when you specifically need to verify Postmark authorization in a domain's SPF record. It is purpose-built for Postmark and uses Cloudflare DoH for reliable DNS resolution, making it faster and more focused than a generic SPF parser. Prefer it over generic DNS tools when checking vendor email deliverability wiring for Postmark specifically, or when auditing whether an unknown sender is legitimately authorized via Postmark.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T12:46:54.241Z","isFirstParty":false,"canonicalSlug":"spf-authorizes-postmark-84a803b0"}