You can do this with a simple autoresponder message. You must design your site for instant updates to reflect sales, discounts or product availability. It is best to pull product information directly from a database for instant updates. You may also want to invest in some content management software to be able to update your content quickly. Product specs and pictures are often printed.
Customers love to comparison shop with a printout in hand.
Also, many business customers have paper-based documentation systems. Respond to All Email You must put a plan together to have every single incoming email answered with 24 hours. This can be a major key for ecommerce success. Start your customer off from the product area where they bought beforehand. This is very possible.