Free tool · SPF lookup counter
Why is your SPF past 10 lookups?
RFC 7208 caps SPF resolution at 10 DNS lookups. Bust that cap and your SPF evaluates to permerror — which in turn fails DMARC alignment on SPF, quietly. Paste a domain; we walk the tree.
Try a sample — each shows a different real-world pattern
Got a finding you don't want to chase?
Hand this off to Mailstinger.
We'll host the policies, rotate the keys, and watch the reports for you. One CNAME and you're done — no spreadsheets, no XML reading, no “what was this DKIM selector again?” moments at 4pm on a Friday.