Send Mail Using Yahoo or Hotmail

Question

Hi to all,

i want to send mail using yahoo or hotmail id any one can help me.
i have a code which is able to send mail using gmail id.

for gmail i am using the port no : 587
and smtp.Host = "smtp.gmail.com"

and for yahoo i am using port no=25
and amtp.Host=smtp.mail.yahoo.com

but when i am using yahoo or hotmail id it is not working plz help me out

any suggesstion welcome.
Rahul Singi