Outlook 2016 global address list not updating
Or, group the contacts by category, then collapse the group you want to mail to, select it and click New Message to Contact.This method works with all versions of Outlook but has several problems: Use Distribution List Manager to create distribution lists from many emails all at once or from a single email with a lot of addresses (or anything in between).It works with To, CC, and From recipients when adding distribution list members from emails; add to existing lists or create a new list each time you add a member.
(You could also, of course, keep each list in its own Contacts folder, but if you have a lot of overlap between lists, updating addresses gets to be a chore.) To send to the list, filter the Contacts folder to show only the names with the list's category, then select all those contacts and click New Message to Contact to create a message to the list.
DLs in Exchange Server mailbox or Public Folders contacts folders are limited to about 128 entries, but those entries can include other DLs.
Outlook 2003 allows you to expand the DL and see all members in the To box before sending the message.
Outlook 98 in Internet Only Mode allows you to create distribution lists called "groups" through the Address Book.
Choose Tools | Address Book, then click the New Group button.