Distribution lists are now known as contact groups. A contact group lets you quickly address multiple email recipients at once:Â
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In classic Outlook, select the  People icon on the left, or press Ctrl+3.
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On the Home tab, select New Contact Group.
If you don't see New Contact Group, select the down arrow next to New Contact, and then choose Contact Group.Â
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Name your group, and select Add Members to add people from the address book or your contacts list.
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When you're done, select Save & Close.
Distribution lists are now known as contact lists. AÂ contact list lets you quickly address multiple email recipients at once.Â
In new Outlook​​​​​​​, the "New contact list" feature is currently under development and will be available soon. In the meantime, we suggest you use the Outlook on the web to create a mailing list.Â
For details, see Using contacts (People) in Outlook on the web, then open the section named, "Create a contact list."
In Outlook for Mac​​​​​​​, a distribution list is known as a contact list. A contact list lets you quickly address multiple email recipients at once.Â
This feature is only available for Microsoft 365 and Outlook.com accounts.
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On the navigation bar on the left side, select  ​​​​​​​People.
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Select New Contact, then select New Contact List.
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Type the name of your new contact list.
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Under Add members, type the email address for your contact, then select Add. You can add multiple email addresses to your list.
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When you are finished adding contacts to your list, select Save.
Tip: You can remove contacts from the list at any time by selecting​​​​​​​Â
 Remove from list, then Save to keep your changes.