Subscriptions be email or through the web. Before an address is added a mail is sent out automatically to check the address is accurate, and that the subscription is wanted.
Messages round the list can be moderated, to prevent inappropriate postings.
It is possible to check all the list subscribers. Addresses that constantly bounce are automatically deleted The service is due to be further upgraded in the next few months, adding more features, such as the ability to handle digests and customise the look of messages sent round the list.