If set to yes , then the requestor must be on the mailing list in order to get a file index. If set to yes , then the requestor must be on the mailing list to use the info command. If set to yes , then the requestor must be on the mailing list in order to get which info from that list. If set to yes , then the requestor must be on mailing the list in order to use the who command. If set to yes , all messages will be forwarded to the owner for approval.
Auto allows anybody to subscribe anybody to the list without maintainer approval.
Closed requires maintainer approval for all subscribe requests to the list.