{"uid":"cap_fpuZiTDkmc_ox0TfJmGlq","slug":"is-email-hosted-by-mailfence-bf6c1246","name":"Is Email Hosted by Mailfence","description":"Is the domain's email hosted by mailfence? Looks up the MX records (Cloudflare DoH) and matches them against mailfence's mail-exchanger patterns, returning yes/no, the MX hosts and which matched. Provider detection for deliverability, sales and migration work. $0.01 per lookup.","url":"https://email.intel.rallylive.ca/email/hosted-by/mailfence?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_yD1tU-g7gnTQkfACdW85N","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 email is hosted by Mailfence by looking up MX records via Cloudflare DoH and matching against Mailfence's mail-exchanger patterns","exampleAgentPrompt":"Can you check if the domain example.com has its email hosted by Mailfence — I need to know if they use Mailfence and which MX records matched?","exampleUseCases":[{"title":"Sales lead email provider research","prompt":"I'm prospecting the company at acme.com — can you check if their email is hosted by Mailfence so I know how to tailor my outreach?"},{"title":"Pre-migration email provider audit","prompt":"Before we start migrating customers away from Mailfence, can you verify that clientdomain.org is actually using Mailfence for their email hosting?"},{"title":"Deliverability troubleshooting check","prompt":"We're having delivery issues with emails going to newsletter-platform.com — can you check if they're hosted by Mailfence and show me their MX records?"}],"resultDescription":"Returns a yes/no answer on whether the domain's email is hosted by Mailfence, the full list of MX hosts found in DNS, and which MX hosts matched Mailfence's known mail-exchanger patterns.","failureModes":["Domain does not exist or has no MX records — returns no match","DNS lookup failure via Cloudflare DoH — may return an error or inconclusive result","Domain uses Mailfence but with custom MX branding — may return false negative","Invalid or malformed domain input — likely returns an error","Temporary DNS resolution timeouts — may fail transiently"],"whenToPreferThis":"Use this endpoint when you need to definitively detect whether a specific domain routes its email through Mailfence, particularly for sales prospecting, email deliverability analysis, or pre-migration audits. Prefer the bulk sibling endpoint when checking multiple domains at once. Choose this over generic MX lookup tools when you specifically need Mailfence pattern matching without building your own logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T00:49:40.377Z","isFirstParty":false,"canonicalSlug":"is-email-hosted-by-mailfence-bf6c1246"}