Search Engine Optimization Ranking

A question for web designers and Search Engine Optimization professionals …?
I often read on the boards of search engine optimization that we should focus on obtaining as many email addresses as possible. Through contact forms, newsletters, rooms, etc, etc. BUT, I do not understand is how to collect email addresses will improve your search engine rankings? Any ideas? Thanks Peter, I meant to obtain the addresses of legitimate email through an own site using common methods. I'm still not sure how will improve the search ranking …
The people who will give an e-mail, fill out a form or perform some other MDA are the prospects future. This email address is a license to backsell the opt-in "- to his grave if desired. Thus, by collecting email addresses, you can e-mail blasts, autoresponders, newsletters, etc to keep the site URL in front of the eyes of potential customers or clients. It has nothing to do with the range of Google. editor@webwordslinger.com
