How to make an email-enabled conference
- Create a regular conference.
- Right-click and select Permissions.
- Make sure that the "Do Not Publish In Directory" option is UNchecked, and make "Internet" a Contributor:

- Click the Directory button and enter a viable email address as the Alias:

Now, any emails sent to that alias will appear in the conference. You can also set normal permissions and subscribers as you would with any other conference.