One of the best ways to build a business is to build a relationship with you prospects through constant contact. You can do this with the phone, meetings (1-on-1 or in a group, or with regular mail, but those are either too time consuming or cost a lot of money. With the internet, you can do this through email. Autoresponders allow you to build relationships and maintain contact using an automated system. With eResponder Pro, you can also send out hundreds or thousands of emails in 1-shot, without being flagged as SPAM - and that's very easy if you're using a free email system like Yahoo, Gmail or Hotmail.