Nice enough...
....app -- tho shouldnt be necessary if Apple paid attention when creating their "contacts" facility. That said, this app is far from intuitive, so unless you use it a lot -- adding, deleting and amending e-mail lists frequently -- youll have to explore your way thru it each time.
Try changing the composition of a mailing list and then using the new list to send e-mails from within "mail"; it probably can be done, but its not obvious how.
West End Al about
ABC Group Messenger