The owner is normally the list creator. List owner responsibilities include:
Overseeing subscription and unsubscription requests.
Managing the list’s settings and permissions.
To contact a list's owner, send an email to firstname.lastname@example.org replacing listname with the actual list name.
The moderator is appointed by the list owner. Moderator responsibilities include:
Managing the relevancy of messages sent to the list.
Approving or declining messages sent to a moderated list.
To contact a list's moderator, send an email to email@example.com replacing listname with the actual list name.
The subscriber is the recipient of messages sent to the list. Some lists will let anyone email to the list, and some lists are set to only allow subscribers to email to it.