There are two general email lists, both hosted on Yahoo!-Groups. To sign up for them, follow the respective links.
If you do not already have a Yahoo! ID, you can create one from the group sign-up page, but this is not a requirement. It does, however, allow you to update your settings more easily — for example, if you change your email address.
To sign up without a Yahoo! ID, send an email to the relevant "-subscribe" address. IF you subsequently change your email address, you will need to unsubscribe (from the old address) and re-subscribe with the new address.
In either case, you will need to reply to a confirmation email: this prevents you being signed-up by someone else without your consent.
Essex-Ringing list is a general discussion (or "chat") list.
EACR-Notices list is an announcements list: only Association and District officers may send messages.
Several Districts have their own email lists. Contact your District Secretary for details.