iCloud User Guide
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View all email headers in Mail on iCloud.com
By default, each email you receive displays the email’s sender, recipients, and date. If you want to see more details about a message—such as an email’s return and delivery paths, “Reply-to” field, and content type—you can display all headers.
In Mail on iCloud.com, select a message.
Click
, then click Show All Headers.
To stop showing all headers, click
, then click Show Default Headers.
See alsoRead email in Mail on iCloud.com
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