Creating a mailing list in Microsoft Office Outlook helps you stay in touch with key contacts in one go so you don't have to enter each person's email address or name when you send a group email. Use the Contact Group feature in Outlook to create a mailing list that contains the people you contact regularly.
Click the "Home" tab in the Outlook menu bar. Select the "New Contact Group" button in the "New" section of the Contacts tools group.
Enter a memorable name for the new mailing list in the "Name" field. Click the "Add Members" button in the "Members" section under the Contacts Group tab. You can now choose to add contacts to your mailing list from several sources.
Select "Outlook Contacts" to add someone from your Outlook contacts file, choose "From Address Book" to add a contact from the Windows Address Book, or select "New Email Contact" to add a new email address that you haven't stored previously. If you select this option, Outlook prompts you to enter the contact's name and email address in the Add New Member pop-up window. If you chose to add a contact from the Outlook contacts file or Windows Address Book, follow the next steps instead.
Click the address book that includes the contacts you want to include in the "Address Book" pull-down list. There may be multiple address books to choose from, depending on your settings and preferences. Click to select each name that you want to include from the list of names in the address book, and then click the "Members" button. Repeat this step for each address book that you want to use.
Click the "OK" button to save the Contact Group mailing list. You can now send an email to the list by entering its name in the email message recipient field or selecting it from the Outlook contacts folder.
You can also create a Contact Group from the addresses in any email that you've received. Right-click the addresses you want to include, and then select the "Copy" option. Paste the addresses directly into a new Contact Group.
The information in this article applies to Outlook 2010 and Outlook 2013. It may differ slightly or significantly for other Outlook versions.