The HEdNI email group is hosted by Yahoo Groups. There are two ways to join:

1) At the Yahoo Groups website:
Clicking on that link will open the Yahoo Groups website in a new browser window. To join the email group this way, you will need to have a Yahoo ID - if you don’t have one, you can set one up (it’s free) or you can join the group by email instead.

2) By email:
Send an email to hedni-subscribe@yahoogroups.com - clicking on the link will open an new email in your email program, ready to send. You don’t have to write anything in the email, just send it. You’ll receive a request to confirm that you want to join.