When someone subscribes for your blog and a new post generates an email, the email is sent from the bloggers email adress. I think that's wrong.
First of all, not everybody wants to give out their email to anyone who visits the blog. Second, it does not look very professional.
I suggest that all emails from the plugin is sent from email@example.com or atleast gives the option to send it from a custom email adress or the members adresses.