Can be anything. Open allows people to subscribe themselves to the list. Auto allows anybody to subscribe anybody to the list without maintainer approval. Closed requires maintainer approval for all subscribe requests to the list. Open allows people to unsubscribe themselves from the list.
Auto allows anybody to unsubscribe anybody to the list without maintainer approval.
Closed requires maintainer approval for all unsubscribe requests to the list. The reply includes an authentication number which must be sent back in with another subscribe command. The value of this keyword overrides the value supplied by any existent files. Open allows anyone access to this command and closed completely disables the command for everyone. Open allows anyone access to this command and closed completely disables the command for everyone.