Whatever type of website you operate, its success will probably hinge on your interaction with your audience. If executed well, one of the most effective tools can be a simple email.
WordPress users are in luck, since WordPress already has easy-to-use and extendable functions to give you a lot of power and flexibility in handling your website’s emails.
In order to create our own system, we will be doing four things. First, we will create a nice email template to use. We will then modify the mailer function so that it uses our new custom template. We will then modify the actual text of some of the built-in emails. Then we will proceed to hook our own emails into different events in order to send some custom emails. Let’s get started to setup Emails For Your WordPress Website!
read more on http://wp.smashingmagazine.com/2011/10/25/create-perfect-emails-wordpress-website/