You can sort the messages in a folder into groups by using Group Labels. Group Labels group the messages according to the column that is being sorted. For example, the message list default sort is by the date, so the Group Label default is also by date. Messages are sorted by the day they are received. You can set a Group Label for each folder.
Right-click the folder.
Click
.Click the
tab.Select
.Click
.To collapse or expand Group Labels, click the + or - sign next to the label.
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