Hacker News·5 min read·hard
SPF Record Syntax: Mechanisms, Qualifiers, Modifiers, and Macros
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meysamazad✦AI Summary
This article provides a comprehensive technical reference for SPF (Sender Policy Framework) record syntax. It details the mechanisms, qualifiers, and modifiers required to properly configure DNS TXT records for email authentication.
SPF Record Syntax: Mechanisms, Qualifiers, Modifiers, and Macros SPF record syntax follows one shape: a single DNS TXT record that starts with v=spf1 , followed by space-separated terms — mechanisms with optional qualifiers, then modifiers — evaluated left to right until the first match. Here is a complete record:
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