Mailing List web page. This page isn't intended to do anything very clever, just briefly describe the list and point you to the Welcome message and the Help File . The list is open to subscribers.
Subscription is free, and easy.
Basically it's a group of people with an email connection and a common interest. Messages - queries, answers, observations, etc mailed to the list address are echoed to all the others, so everyone gets to see the queries and answers, and gets the opportunity to respond or join in. No subject line is needed, but you can use one if you want to. In Digest mode, the list saves up all the individual messages for about a day and sends them to you in one big message. This is less immediate, but you get fewer messages.