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Gmail tracking unreplied emails5/17/2023 ARC-Seal: "Seals" the ARC authentication results and the message signature, verifying their contents similar to DKIM.ARC-Message-Signature: The signature takes a snapshot of the message header information for validation, similar to DKIM.ARC-Authentication-Results: The Authenticated Receive Chain is another authentication standard ARC verifies the identities of the email intermediaries and servers that forward your message to its final destination.Return-Path: The location where non-send or bounce messages end up.Received-SPF: The Sender Policy Framework (SPF) forms part of the email authentication process that stops sender address forgery.Authentication-Results: Contains a record of the authentication checks carried out can contain more than one authentication method.You read "Received" lines from bottom to top the bottom-most line is the originator. Received: The "Received" line lists each server that the email travels through before hitting your inbox.DKIM-Signature: Domain Keys Identified Mail authenticates the domain the email was sent from and should protect against email spoofing and sender fraud.To: The intended recipients of the email may show other addresses.Subject: The subject of the email contents.MIME-Version: Declares the email format standard in use.The most common character sets are UTF-8 (seen in the example) and ISO-8859-1. Content-type: Tells your browser or email client how to interpret the content of the email.From: Displays the message sender it is easy to forge.Reply-To: The email address you send your response to.First, understand what each line means (reading from bottom to top).
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