email scraping

I'm looking to have a system set up that will allow me to capture email addresses from websites with the goal of market research. I have a list of keywords that they should be looking for, and I need them to be specifically sourced from the United States. I'm looking to have the email addresses screened and compiled into an easily manageable format for further analysis. If possible, I would like to find a way to automatically update the following information to assist in segmenting my research by source: URL, Date Captured, and any other metadata available. I plan to use this system for researching the market and finding potential leads.