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Free Email Security Tool
Verify your Sender Policy Framework record is correctly configured. Detect missing, broken, or overly permissive SPF records that let spoofers abuse your domain.
Free forever · No account needed · Instant results
A silent SPF or DKIM change can quietly send your emails to spam for weeks before anyone notices. Drop your email and we'll alert you the moment something looks off, so you fix it in minutes, not after a deliverability cliff.
Check every aspect of your email infrastructure
Mailsoftly handles SPF, DKIM & DMARC automatically. Campaigns, automation, and analytics in one place.
Free to start with your Google Workspace account. No credit card required.
This free SPF checker fetches the SPF record for any domain and validates it against the rules receiving servers actually enforce. SPF is a TXT record at your root domain that starts with v=spf1 and lists every server allowed to send email for you. The checker parses each mechanism, counts your DNS lookups against the limit of 10, verifies you publish only one SPF record, and grades your all qualifier: -all rejects unauthorized mail, ~all softfails it, and +all lets anyone spoof you. Fix the flagged issues and your SPF passes at Gmail, Outlook and Yahoo.
Enter your domain into the SPF checker above. It queries your TXT records live, finds the one starting with v=spf1, and validates the syntax, the DNS lookup count and the all qualifier. The three failures that break SPF most often are publishing two SPF records, exceeding 10 DNS lookups from stacked include mechanisms, and ending with +all. If you need a correct record from scratch, build one with our free SPF record generator and paste it at your DNS host.
