Network tool
SPF Checker
Inspect the SPF TXT record published for a domain.
What this result means
SPF checks the SMTP envelope identity, not simply the visible From address. DMARC adds domain alignment on top of SPF and DKIM.
How this check works
This checker parses one published SPF record and reports direct DNS-lookup-causing mechanisms; it does not execute a full recursive RFC SPF evaluation. -all requests failure, ~all soft-fail, ?all neutral, and +all pass; the right policy depends on the domain's sending design.
Learn more: What Is an SPF Record? SPF Syntax Explained →