In outlook, press Ctrl+Shift+L, distribution list; name it and add to it those persons you need to for a group; save it (it will be saved in contacts); when you want a mail to go this list (group), press New and type the name you gave to this distribution list (group) in the address field. When it arrives, it will expand the name of the group to the individual addresses of each & everyone of members of this grop.