You can subscribe to the list in mail mode (you receive every message individually) by sending a message to NDCASS-L-request@rootsweb.com that contains the word
subscribe
and nothing else. If you prefer digest mode (receive messages grouped into one email), send the command instead to NDCASS-D-request@rootsweb.com.
To unsubscribe, send the command "unsubscribe" to NDCASS-L-request@rootsweb.com (if in mail mode) or NDCASS-D-request@rootsweb.com (if in digest mode.)
To switch from one mode to the other, unsubscribe from one and then subscribe to the other. There is no "no mail" mode -- if you want messages to stop, you should simply unsubscribe.
To post to both NDCASS-L and NDCASS-D, messages should be sent to NDCASS-L@rootsweb.com. Messages sent there will appear both places.