Outlook uses contact groups to store the members of a distribution list. After you create a contact group and add contacts, you compose a single e-mail message and address it to the contact group. That way, everyone in the distribution list receives the same message, saving you time.

To create a contact group in Outlook, create the list and choose where to store it. Here's how:

Go to the Home tab and select New Items.

Select More Items > Contact Group. Or press Ctrl+Shift+L.