Zovo DNS Checker

Zovo DNS Checker reads public DNS-over-HTTPS responses and returns email-authentication findings and downloadable CSV reports. check_email_dns inspects MX, SPF lookup counts against the limit of ten, DMARC policy/reporting/alignment, and DKIM keys for up to five supplied selectors. lookup_dns_records returns A, AAAA, MX, NS, TXT, CNAME, CAA and SOA records with TTLs.

Limitations. Only public-resolver answers are visible. Successful responses may be cached for 60 seconds to one hour based on TTL; results identify their source and retrieval time. DKIM requires the selector name. This is not a deliverability test and does not send or receive mail. It reports configuration rather than what a specific receiving server will decide. CSV download links expire after about one hour.