Around half of readers get these notifications via email and around half via
RSS. If you are getting them by email you may be interested in considering
using RSS not just for these notifications but for other feeds as well. This
new article by editor Phillip explains what RSS is all about and shows you
the benefits. Sort of "Everything you wanted to know about RSS but were
afraid to ask." It is well worth reading.
http://www.techsupportalert.com/content/what-rss-all-about.htm