Email Authentication Overview

  • Email authentication is a crucial technical standard ensuring your identity is verified, preventing your emails from being flagged as spam or phishing attempts.
  • Without email authentication, malicious individuals can manipulate their email addresses to mimic legitimate senders and deceive recipients.

Implementation by the IT Team

  • Your IT team is responsible for implementing email authentication.
  • They configure mail servers to allow a recipient's email server to check incoming messages against established rules.
  • Gmail and Microsoft typically set up these policies during mailbox configuration, but it's advisable to confirm, especially before large email campaigns.
  • If using Exchange, coordinate with your IT team to ensure SPF and DKIM are set up before sending mailings.

Email Authentication Standards: DKIM, SPF and DMARC

  • DKIM (Domain Keys Identified Mail)
    • An authentication protocol used by email receivers to verify the sender's legitimacy.
    • Utilizes a specialized key unique to each sender, assuring the recipient's mailbox of the message's authenticity.
      • Positively contributes to your anti-spam score.

  • SPF (Sender Policy Framework)
    • Email validation system preventing spam and authenticating senders.
    • Checks the sender IP address to ensure it's authenticated and verified.
      • Incoming servers reject emails from unlisted SPF records, assuming they are spoofed or illegitimate.

  • DMARC (Domain-based Message Authentication, Reporting & Conformance)
    • Another authentication protocol enabling senders and receivers to report potentially fraudulent domains.
    • DMARC policies indicate authenticated messages via SPF and Bounced Email Notifications

When you send an email and it is rejected by your prospect's email server, you receive a bounced email notification. There are two primary types of bounces: hard bounces and soft bounces, the details of which are explained in the FAQ.

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