This blog is hosted on a GoDaddy Economy Hosting account, and I had some trouble in getting all the features to work initially.
I got some help from Aakash’s article on the setup.
To get the “Contact Author” and “Comment Notification” to work, i had to set up an email account with GoDaddy ( I had some free email forwarding accounts as part of my plan). After that, updating the Configuration tab in DasBlog with the correct smtp server setting (relay-hosting.secureserver.net) did the trick and the email features are working as expected.