MSN - Get Friends List Of Email Addresses

I've noticed, on some sites, that they give you the option to invite your 'friends' on MSN by simply submitting the address you use for MSN. Then an email will be sent out to all the people in your list.

Then you receive the:

"Some person you never speak to has invited you to some site", text in an email.

How do they do this or, more specifically, how can I do this on a site of my own?

Thanks,

DD.

 

Aren't these sites usually affiliated with hotmail? That's why you have to use your hotmail addess and password to login to the site can take your contact list... also, they're usually placed in reputable sites such as Facebook.. etc which probably have a privacy note saying that they can "give away" your email address.

 

ITs a script, that invites other. You can find it for hotmail gmail etc

 

I run one of these on my sites:
http://sourceforge.net/projects/contactgrabber/

I only put it up the other day, so i can't really comment on how effective it has been.

 

Yeah, but you need to put your password in also?

 

Yeah because it basically uses curl and php to connect to the webmail service and download your contact list.