To display a message’s full email headers in Gmail:
- Select an email message in Gmail
- Select the “more” menu icon – three dots (ellipsis) vertically aligned in the upper right corner of an email
- Select Show original
- Header information appears in the new Chrome tab:
- 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