I use MailChimp to handle my 'newsletter' delivery. Your e-mail address is held privately and will not be sold or given away for any reason. MailChimp makes it easy for you to unsubscribe at any time. I mainly use my blog as a way to keep you updated on new book releases and my current work in progress. You don't need to worry about me overfilling your inbox. Several months may go by without a blog post. It's a little sad, really. ;-)
Likewise, if you e-mail me privately, your e-mail address will go no further than my inbox. It will not be added to my mailing list, nor will it be sold or given away for any reason.