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LiveSource: DNS · public resolvers 1.1.1.1, 8.8.8.8Observed:
Results are fetched live. DNS answers may come from a resolver cache for up to the TTL shown.
What this service recorded for this name on earlier checks. A check happens only when someone opens a report or calls the API: nothing is scheduled, so gaps between checks are normal.
The history is kept for the domain name only; nothing about who looked it up is stored. Entries not seen again for 400 days are deleted. Changing A, AAAA and hosting values are normal for sites behind load balancers or content delivery networks.
The tool reads the MX records of the domain and lists each mail host with its preference value. Where the hostnames match a well-known provider pattern it names the likely provider. It then fetches the SPF policy from the TXT records of the domain and the DMARC policy from _dmarc under the domain, parses both and reports findings.
Everything here is read from public DNS. The tool does not connect to your mail server, send test messages or look inside any mailbox.