A wrong answer about your own domain is worth reporting, and it will be read.
The most useful bug report is a domain name plus what you expected. Every audit page links to its own JSON output — including the full DMARC tree walk and the SPF lookup count — so a disagreement can be checked precisely rather than argued.
support@drumlin.dev — monitored, and the right place for a wrong result, a bug report, or a question about how an audit was computed. Support is best-effort; there is no response-time commitment.
Billing for the paid bulk actor is handled by Apify as merchant of record. Charges, invoices and refunds go through Apify rather than through this address — see pricing.