Contacts in Outlook 365 2016 2013 2007 2003

How to create a contact group in Outlook

If you regularly send e-mails to the group of people, you can create a Contact Group and send them an e-mail with just a few clicks.

How to create a New Distribution List

In Outlook 2010 you wouldn't find a distribution list because it's called now Contact Groups, for more details see How to create a Contact Group in Outlook.