Free SPF Record Checker & Syntax Validator
Validate your Sender Policy Framework (SPF) record. Detect syntax errors, multiple records, and exceedance of the 10-lookup limit before launching campaigns.
Why Cold Outbound Teams Use Our Free SPF Checker
10 DNS lookup limit counter
Multiple SPF record warning
Include & IP mechanism breakdown
Email Deliverability Standards (US & UK Outbound Guidelines)
In February 2024, Google Workspace and Yahoo introduced strict anti-spam enforcement rules that mandate proper SPF, DKIM, and DMARC authentication for all outbound mailboxes. If your DNS records have syntax errors or exceed the 10-lookup threshold, incoming mail servers will silently route your cold outreach into the Spam folder or reject connections entirely.
Requires valid physical postal address in signatures, accurate From header identification, and clear opt-out mechanics.
Permits B2B outreach under legitimate interest when targeted to relevant corporate decision-makers with authenticated sender identity.
Frequently Asked Questions About SPF Checker
What is the SPF 10-lookup limit?
The SPF specification (RFC 7208) limits DNS lookups to at most 10. If your SPF record contains too many "include:", "a", "mx", or "redirect" mechanisms, receivers throw a PermError and discard your emails.
Can I have multiple SPF TXT records on one domain?
No! Having more than one SPF record on a single domain causes an immediate PermError. All authorized senders must be merged into one single "v=spf1 ... ~all" record.
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