Audits SPF, DKIM and DMARC for a list of domains, including the RFC 9989 DMARC tree walk and the SPF ten-lookup limit that quietly breaks bulk senders.
Every verdict carries the records it was computed from: the full tree walk, the SPF lookup count, and which DKIM selectors answered. Re-derive any result from public DNS rather than taking ours.
$0.004 per domain successfully audited. Duplicates, unparseable entries and failed lookups are never billed, and a run that audits nothing is free.
Run it on Apify · Free web version
Questions or a wrong result: support@drumlin.dev. More about the studio: Drumlin Labs.