Customer Email / Review site relationship

[Newman]

I believe that more reviews will be posted If the customer does not have to register with and give thier personal info to another site. It is hard enough for me to get thier email addresses. I want to request reviews on sites where they are currently registered. Some are easy such as:

@gmail.com = google places
@yahoo.com = yahoo places

What review sites are ok with a facebook registration?

This is a list of common addresses amongst my clients. If you know of review sites that are associated with the following email addresses please let us know.

@msn.com
@hotmail.com
@aol.com
@sbcglobal.com
@mac.com
@comcast.net
@ameritech.net
@att.net
@wowway.com
@me.com
@earthlink.net

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