SPF Record Checker
Find and sanity-check v=spf1 TXT policies for a domain.
SPF (Sender Policy Framework) publishes which hosts may send mail for a domain using a TXT record beginning with v=spf1. DNS Checkers retrieves that TXT set, flags missing or duplicate policies, and lists mechanisms so you can spot overly nested include: chains. Pair with DMARC and DKIM. After edits, verify caches on the propagation checker. Results are from this server only and are not a guarantee of inbox placement.
Operational tip: keep a single SPF string, prefer IP mechanisms for stable infrastructure, and monitor DNS lookup limits (10) when chaining includes. Use the blog’s email authentication guide for alignment concepts with DMARC.
Frequently asked questions
Quick answers about propagation, resolvers, and how this checker works.
Are email auth results a guarantee of inboxing? +
No. They show published DNS policy and banners. Inbox placement also depends on reputation and content.
Does DNS Checkers send email during SMTP tests? +
No. SMTP tests only connect and read a banner, then quit.
Where do SPF/DKIM/DMARC live? +
SPF and DKIM publish in TXT; DMARC lives at _dmarc.domain as TXT.
Is this free? +
Yes. Phase 2 email tools are free with the same AdSense-safe policies as Phase 1.
Can results differ by resolver? +
Yes. After DNS edits, use the propagation checker while caches expire.