All projects matching “mx record lookup”

Validate an email address: format check plus a live MX record lookup on its domain

Parse a pasted SPF record without DNS (RFC 7208): mechanisms with qualifiers and values, modifiers, syntax errors, the all policy and the number of terms that need DNS lookups, with coded findings such as +all, ptr and over ten lookups. Use when an agent must check an SPF record before publishing it. Input: {"record": "v=spf1 mx include:_spf.example.com ~all"}.

Email authentication check (SPF, DKIM, DMARC): Check a domain's email authentication and spoofing risk from public DNS: MX and mail provider, SPF (record, all-qualifier, DNS lookup count vs the 10 limit), DMARC policy/pct/rua, DKIM at 30 common selectors, MTA-STS, TLS-RPT, BIMI. Returns grade, spoof

InboxGuards Email Test: Email security fix plan: the exact SPF, DKIM and DMARC records to publish, with steps for your DNS host. Reads the domain's live MX, NS, SPF, DKIM and DMARC records, detects the mailbox provider and DNS host, and returns the exact records to publish in order (create / replace / keep, name, value, why): one merged SPF within the 10-lookup limit, DKIM records or the provider

Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per d

Reverse-resolve an IPv4 or IPv6 address to its PTR hostname(s). No PTR record returns an empty list. This is reverse DNS (PTR) — not ENS or onchain name resolution.

Validate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing.