Before purchasing at your store, your customers will need to register. They'll only have to do this once; on their next visit, they can simply log in. Registration also adds their details automatically to the general Joomla database.

 
After registration, they'll receive a confirmation email and after the purchase, another email with the purchase confirmation. Use this email to thank your customers for doing business with you and for marketing. For example you can tell them about other products you sell or point them to helpful pages with tips, FAQ, etc.

Registration Form

Email Tab