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SPF Qualifier Reference — Generate and validate SPF qualifiers for your domain. Try Tool →

What are SPF qualifiers (e.g., +, -, ~, ?)?

Qualifiers determine the result applied when a mechanism matches:

  • plus means pass.
  • minus means fail.
  • tilde means softfail.
  • question mark means neutral.
  • Without a qualifier, the default is pass.
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