An email internet header provides you with further technical details about the message, such as, who sent it, the software used to send it, the email servers that it passed through on its way to the recipients.
1. Double click on the email message you want to view its headers.
2. Click File.
3. Select Properties.
4. Header information will appear in the Internet Headers box.
1. Open the message you want to view its headers.
2. Click on the three dotted menu.
3. Select View Message details.