There are some emails in my Bulk Mail that has personal information in the Subject.

I know tht i can delete that email(s)
But I dont know how thtey got the information in the first place and i would like to report that email
i would like for the particular email site or whatever to not send NOTHING to me
I would like to know where it came from…because they have that kind of info
Its not just that I have All this bulk.. because i know i can put it 0 but then when i do not have te time to let you (for instance) to be able to email me it will go into bulk so therefore i delete you (no)
But I do not like at ALL how they have obtained this info
Plz help