Can i find a profile with only a partial e-mail address?

How can I find out someones profile and also if they are on line? I have the persons email address.

I want to look at someone's profile and all I have is there yahoo email address, where do I need to go to do that?

all i have is a yahoo email address and i wanted to view the profile for whoever it belongs to

i have a email address of my best friend but he did not respond me through mail , i want to check his address or contact number

My friend invited me to their profile, But, I don't know her email address yet. HELP!

There is nothing sinister going on. I found a person on the dating site that i would like to contact but when I tried to subscribe it kept telling me there was something wrong with my card. Never had any problems with it before and would really like...

I found some of apps achieved this, such as Evernote Hello.

I am trying to find a old friend and I do not know thier email adress just their personal info. I am having a hard time finding where it is I go to, to find her profile on yahoo.

I know a certain user id is taken - I tried to get it myself. How can I find that person's profile to see if it is an old friend? Is there a way to find this out without emailing them? When I went through the yahoo member search, it came up with no results...