The E-mail Digest Type, also located under edit profile, allows you to determine
whether or not to receive an e-mail of every post to every forum you have
subscribed, a daily e-mail with full posts, or a daily e-mail with only
the subject headings of all posts. This is a good feature for those who
may feel overwhelmed with the abundant amount of e-mail they are receiving,
but still want to keep up-to-date without having to log in to their class
multiple times a day.