If the address is already in the digest list, it is first removed from the digest list. If the address is already in the subscriber list, it is not added. Name is optional. If the address is already in the subscriber list, it is first removed from the subscriber list. If the address is already in the digest list, it is not added.
Name is optional.
OldAddr NewAddr Name Changes the address of a subscriber. Name is optional. A separate message is sent for each list of subscribers. Lists of greater than 5000 subscribers are not returned. This allows a signature to be ignored.