Example result
SPF tool
SPF lookup counter
Enter a domain or paste a record. You get a count like the example: every lookup, nested includes too, against the limit of 10.
An SPF record may trigger at most 10 DNS lookups (RFC 7208 §4.6.4). Each include, a, mx, ptr, exists, and redirect= costs one — nested includes count recursively. Go over and receivers return PermError, which fails your SPF silently. Paste a record for a direct count, or a domain for the full recursive total.
Diagnose your domain
Check SPF, DMARC, DKIM, MX, DNS health, blacklists and domain & SSL expiry in one free scan — with the exact record to paste in to fix each problem.