If you subscribe to a closed list, the
lists administrator must approve
your membership.
If you subscribe to an open list, your acceptance is automatic as
long as you have formatted the request properly.
Some mailing lists provide an option for receiving message digests, in which
several postings are grouped into a single e-mail message to help reduce the number of messages you receive from the list.
Some lists let you temporarily stop receiving messages
and resume service at a
later date (during vacations, etc.).