SPF Record Checker — Free SPF Validator & SPF Tester
Use this SPF checker to quickly test your domain’s SPF record, count DNS lookups, detect misconfigured or multiple SPF records, and receive clear suggestions to improve email deliverability and SPF compliance.
This SPF validator performs a server-side DNS TXT lookup to avoid browser CORS limits, extracts text starting with v=spf1, then analyzes mechanisms that cause DNS queries (e.g. include:, mx, a, ptr, exists:, redirect=) and estimates lookup count.
Why use this SPF Checker
Accurate server-side TXT lookups — reliable SPF extraction and analysis.
Detect multiple SPF records, excessive DNS lookups (limit is 10) and very long SPF strings that may break evaluation.
Actionable suggestions to reduce lookup count, flatten SPF, or reconfigure providers for better email deliverability.
How to fix common SPF problems (quick guide)
Merge multiple SPF records into a single v=spf1 record.
Reduce include: usage — ask providers for IP ranges or use selective includes.
Flatten SPF sparingly (convert includes to IPs) and keep length < 450 characters when possible.
Use subdomain delegation for third-party senders where applicable.
Confirm DKIM and DMARC are configured to improve deliverability overall.
About SPF
SPF (Sender Policy Framework) is a DNS TXT record that specifies which servers can send email for your domain. Proper SPF configuration reduces spoofing and increases deliverability when used with DKIM and DMARC.
