Email, Messaging, & Video Calls Email See Full Message Headers in iCloud Mail Learn the sender's IP, location, routing details, and more by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on April 07, 2019 AJC1/Flickr/CC BY-SA 2.0 Email Yahoo! Mail Gmail Tweet Share Email Every email contains a header, a list of information that details the origin, destination, time, program, and other metadata about that email. Your mail at iCloud.com is no different. What Does a Header Include? Specifically, a header includes some or all of the following, plus much more: The senderThe recipientDate sentThe subjectCC (carbon copy), if applicableBCC (blind carbon copy), if applicableThe time sentThe time receivedThe sender's locationThe email service used to send itRouting details Such information can be useful in many ways. For instance, it can help you spot junk email and scams and who to block if you're being harassed. How to See It Much of this information is hidden by default, but iCloud Mail at icloud.com makes it easy to uncover. Here's how: Double-click the desired message to open it in a new window.Click the Gear in the message's toolbar.Select Show Long Headers from the menu that comes up.