It's a good idea to apply filters to your emails if you are subscribed to a list, so that your inbox does not become too cluttered, especially if you are on vacation for a spell. Some lists generate lots of entries every day. Beware of using 'Reply' facilities of your email software, until you know whether the reply goes to an individual or to the whole list. The potential for embarrassment, or even legal problems such as defamation suits, is there, so it is wise to know well how the list works and to think before you write and act in a professional way. A good rule of thumb is to assume anything you write in any email can be made public, including in a court of law, and write accordingly.
Lists come and go to an extent, and wax and wane a bit with time.
The following are worth a try, in my view. To subscribe to a list, you usually just need to send a single-line email indicating that you want to subscribe. It's a good idea to remove your signature file from the email when subscribing. There is no charge for subscription to these lists, but the flow of traffic may incur a charge, depending on the nature of your internet service contract. The AAMT-L is the AAMT's email community.