One of the long-lasting Internet products like email is email marketing, which can spread rapidly like a plague with high effectiveness, high speed and low cost. This makes it highly appreciated by numerous product/service salesmen around the world since the day of its birth. Because they firmly believe that -- among the countless emails sent every day, they can always receive response from some potential customers. If you need to send an email to a tremendous amount of customers at work, then a bulk/batch email sender will definitely save you too much time and effort.