I have a gmail account, and i registered to many websites using that email. I want to know if there is any way to know what sites are registered with this email. (for example i can sign to facebook, daniweb, twitter using that email and also to other websites, so how can i know what are these others websites. Does google provide this function)
you are trying to wathch anther gmail users account ?else your gmail account ?
if you register on site then they will send you mail about verification or welcome based on this you can check mail based on that criteria after all.