To display a message’s full email headers in Gmail:

  1. Select an email message in Gmail
  2. Select the “more” menu icon – three dots (ellipsis) vertically aligned in the upper right corner of an email
  3. Select Show original
  4. Header information appears in the new Chrome tab
  5. You can copy the text in the clipboard or download the original as an “eml” file

The original message contains the following fields:

  • Message ID – the digital fingerprint of a message. This is also called RFC822 Message ID.
  • Created on
  • From
  • To
  • Subject
  • SPF – Sender Policy Framework is a DNS record that identifies specific mail servers that are allowed to send an email on behalf of your domain
  • DKIM – DomainKeys Identified Mail is an email security standard designed to make sure messages aren’t altered in transit between the sending and recipient servers
  • DMARC- Domain-based Message Authentication, Reporting, and Conformance is a technical standard that helps protect email senders and recipients from spam, spoofing, and phishing
  • BODY