The message are just like any other email. Your message will automatically be sent to all the other subscribers. Subscribing and Unsubscribing Different listservers handle the subscription process in different ways. For some lists you must ask the owner to add your address to the subscribership. There are many thousands of lists on the internet.
Subscription charges Email lists are traditionally free of charges.
Unless stated otherwise, list subscriptions are free. To send a message to all the subscribers, you send your message to the main list address. An easier way to send mail to the subscribers is to reply to one of the messages you've received. This is normal, since if everyone talked all the time, the volume of messages would be enormous. If a list has 100 subscribers and each one sends only one message per month, then there will always be several conversations going on.