If you are interested in checking only one type of mail, such as unread messages, in a container, you can list only those messages. Your changes are only in effect for as long as you have the container open.
To list only a certain type of mail:
1 Open the container.
2 Click the pane you want to work with, if there are multiple window panes.
3 Choose View > Filter, then one of the following:
You can also list only unread messages by default.
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