SPF Checker
Ensure your SPF records are valid and secure.
SPF Record Checker
Query, visualize, and validate the Sender Policy Framework (SPF) records for any domain to ensure maximum email deliverability and prevent spoofing.
Enter a domain above to audit its SPF configuration.
What is an SPF Record?
SPF (Sender Policy Framework) is an email authentication method designed to detect forging sender addresses during the delivery of the email. It allows the receiving mail server to check during mail delivery that a mail claiming to come from a specific domain is submitted by an IP address authorized by that domain's administrators.
Why is SPF Important?
- Prevent Spoofing: Prevents spammers from sending messages with forged From addresses at your domain.
- Improve Deliverability: Emails from domains with a valid SPF record are more likely to reach the inbox instead of the spam folder.
Common Issues
- Too Many DNS Lookups: SPF records are limited to 10 DNS lookups (e.g., using `include`, `a`, `mx`). Exceeding this limit will cause SPF validation to fail.
- Multiple SPF Records: A domain must have exactly one SPF record (starting with `v=spf1`). Having more than one will cause validation to fail.
- Permissive Policies: Using `+all` allows any IP to send mail on your behalf. It is strongly recommended to use `~all` (soft fail) or `-all` (hard fail).
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