SPF Records Test

What is an SPF Record?

Sender Policy Framework (SPF) is a DNS-based email authentication method. It allows domain owners to specify exactly which mail servers are authorized to send email on behalf of their domain, helping to prevent email spoofing and phishing.

• Mechanism: A directive like a, mx, or include that defines a set of authorized IP addresses.
• Modifier: Additional instructions like redirect or exp.
• The “All” Tag: Tells the receiving server what to do with mail that doesn’t match any mechanism (Softfail vs. Hardfail).

Why SPF is Critical for Delivery

Without a valid SPF record, your legitimate emails are much more likely to be flagged as spam by providers like Gmail or Outlook. It establishes the “trust path” between your domain and the recipient’s inbox.

SPF is the foundation of email trust. By explicitly defining your sending sources, you protect your brand reputation and ensure your critical business communications reach their destination.

SPF Best Practices

Follow these rules to ensure your email authentication remains robust:

How to Use This Tool

Enter your domain name (e.g., example.com) and click “Check SPF”. We’ll query your public DNS records, parse the SPF string, and analyze it against RFC standards. You’ll see a breakdown of authorized servers and alerts for common configuration errors like excessive lookups or syntax typos.