Display and Send Email headers

If you need to send the information in the full headers of an email message (to report possible phishing or spam, for example):

1. Follow the appropriate instructions below to first display the message headers.
   • Microsoft Outlook for Windows: Double-click the message to open it in a new window. Select the File tab, and then, at the bottom, click Properties. The data is next to Internet headers.
   • Outlook Web App (OWA): Double-click the message to open it. Click the options icon (three dots near the top right), and then click View Message Details.
   • Outlook Express, Windows Mail, or Windows Live Mail (Windows): In the message index, right-click the message, and then select Properties. Click the Details tab.
   • Outlook for Mac OS X: In your Inbox (or other folder), right-click or control-click the message, and then select View Source.
   • Thunderbird (Windows, Mac OS X): Click View, select Headers, and then choose All.
   • Mail (Mac OS X): With the message selected, from the View menu, select Message, and then select either All Headers or Long Headers.
   • Imail: Select the message, click the down arrow in the upper right corner, and then select View message details.
   • Umail: Click the mail message to display it in the message pane. Next to "Reply", click the down arrow, and then click Show original.
2. Copy and paste that information into the email message you wish to send.

From https://kb.iu.edu/d/adix