SPF Record Checker

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

How SPF Works:

1. You publish an SPF record in your domain's DNS as a TXT record
2. When someone receives an email claiming to be from your domain, their mail server checks your SPF record
3. The receiving server compares the sending server's IP against your authorized list
4. Based on the match, the email is accepted, rejected, or marked as suspicious

SPF Record Components:

• Version: Always starts with "v=spf1"
• Mechanisms: Define which sources are authorized (ip4, ip6, include, a, mx, etc.)
• Qualifiers: Specify the action to take (+pass, -fail, ~softfail, ?neutral)
• All mechanism: Defines the default policy for unlisted sources

Benefits of SPF:

• Reduces email spoofing and phishing attacks
• Improves email deliverability and sender reputation
• Helps prevent your domain from being used in spam campaigns
• Required for DMARC implementation