You can't send email to a folder. When new email arrives to a conference there's a red post-office flag. No notification of new messages to folders. Many folders can have the same name. Special permission must be given for conferences.
Folders require no permissions.
How to Setup Permissions Setting up permissions is a very simple process. Type in the new name. Say I didn't want everyone in my class to have access to this particular conference. Once you've done this then you need to select the appropriate permission status for each entry. This will get rid of the underline on your conference and will ensure that you don't accidentally delete anything.