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SPF Record Checker

Ensure your domain is properly authenticated with our SPF record checker. Avoid spoofing and improve inbox placement.

Check SPF Record

Verify your domain's SPF configuration

What is SPF?

SPF (Sender Policy Framework) is an email authentication method that helps prevent spoofing by specifying which mail servers are authorized to send email on behalf of your domain.

Common SPF mechanisms:

  • include: - Authorize another domain's servers
  • a - Authorize your domain's A record IPs
  • mx - Authorize your MX servers
  • ip4/ip6 - Authorize specific IP addresses
  • -all - Reject unauthorized senders (recommended)

About this tool

This free utility is designed to help email marketers and developers improve their deliverability and campaign performance. At Sequenzy, we believe in providing transparent, helpful tools for the community.

Frequently Asked Questions

SPF (Sender Policy Framework) is an email authentication method that specifies the mail servers authorized to send email on behalf of your domain.

Without an SPF record, your emails may be marked as spam or rejected by recipient servers because they cannot verify that the email actually came from you.

SPF has a limit of 10 DNS lookups. Each 'include', 'a', 'mx', and 'redirect' mechanism counts as a lookup. Exceeding this limit can cause SPF failures.

-all (hard fail) rejects unauthorized emails outright. ~all (soft fail) marks them as suspicious but may still deliver. -all is more secure but ~all is safer when first implementing SPF.

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