Let me tell you about useful application named email extractor which I recently found. It extracts email addresses from community bulletins. Sometimes you don't need to scan and extract emails form the whole site . Enter urls to email extractor and it will do the work for you.
Email extractor may harvest emails on websites like forum, blog, Facebook, Twitter or any other website where you think your customers are concentrated. You might not know where your prospects surf but you might have some keywords which describe your business. Use these keywords in email extractor and it will find all of them in search engine like google. Extract emails from sites Enter site/blog/forum name you want to scan and extract email addresses.
Sometimes you have useful product and you don't know how to make it famous. You definitely need to advertise it somehow. Email extractor can also harvest emails from mail boxes, files. Email extractor tool is useful if you have to contact customers and make advertisement campaigns.
You can find all email addresses scan all files on your disk and extract. In some cases you might not know websites you need to extract emails from but you might have relevant and domain specific keywords describing your customers. All you need to do is to type keywords in the in application and click search inside email extractor. They all have emails. Without doubts people leave contact info such as phones, emails on sites open.
Did you research where your potential customers are on internet ? I believe they are spend time on forums, blogs and any websites. The easiest way to sell your products or services is to contact customers directly by email address, phone. How to harvest customer' emails from forums and blogs ? One of the ways is to search them in Google, Yahoo, Bing or run email extractor.