Unread E-Mail messages are marked with the Unread icon . In order to mark an E-Mail as read or unread, you can do the following:
mark an individual E-Mail or a complete E-Mail conversation as read or unread
mark all email messages in an email folder as unread
How to mark an email as unread:
Select a read E-Mail.
Click on More in the tool bar. Click on Mark as unread in the menu.
In order to mark this E-Mail as read, click on Mark as read.
Tip: You can also mark multiple E-Mail messages at once as unread.
How to mark all email messages in a folder as read:
Select an email folder in the folder tree.
Click the Folder-specific actions icon next to the folder name. Click on Mark all E-Mail messages as read.