SPF Analyzer
Validate SPF syntax, recursive includes, redirects, void lookups and the 10-query DNS lookup ceiling.
Live check · No account required · Results depend on the DNS resolver and network access available to this hosting server.
ABOUT THIS TOOL
What the SPF Checker tests
The SPF Checker reads the published SPF TXT record, validates common syntax, follows supported include and redirect relationships and tracks DNS-query-consuming mechanisms. It highlights configurations approaching or exceeding SPF’s lookup ceiling and surfaces recursion or missing-record problems that can cause evaluation errors.