Mailing lists are by subscription only. You send a subscription request to the central computer, which then processes the request. Some lists have open subscriptions, others will require you to provide information about yourself before you will be subscribed. Some lists are moderated, others are not. Once you've been subscribed to the list, you will be sent detailed instructions on where to send queries or commands and where to send posts to the list.
Many lists also send along information about list etiquette.
Read this information carefully and keep a hard copy in a secure place. Leave the subject line blank. In the body of the message type subscribe aednet first name last name . Leave the subject line blank. In the body of the message type subscribe edstyle first name last name .