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Email authentication

ARC

A comprehensive collection of questions and answers about ARC email authentication from email marketers, experts and technical documentation.
What is the purpose of the ARC 'cv=pass' result?
Does ARC validate the 'From' address?
What is the 'cv=fail' result in ARC?
What is the 'arc-authenticated-results' header?
What is the 's=' tag in an ARC-Message-Signature header?
What is the 'ARC-Message-Signature' header used for?
What is the 'c=' tag in an ARC-Message-Signature header?
What is the role of the 'Authentication-Results' header in ARC?
What is the ARC 'chain' concept?
Does ARC use DNS queries for validation?
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