I think I have just found my biological father online...

I just randomly put in a search for his name and it lead me to a profile which shows his age and location (which matches up with what my mother has told me about him).

I'm pretty certain it's him. I want to send him an email, but I dont know what to say. I've never met him before as he left before I was born.

Should I be direct and say something along the lines of 'I think you're my father' or should I try to find out more about him first?