Send msg to all groups but don't know name of groups

ngocthobkdn <[email protected]>
Newsgroups gmane.network.spread.user
Message-ID <[email protected]> 
Dear all,

I am student in France, I study Spread and i have a problem
I want to send messages to all group of Spread but i don't know name of 
groups
How can i know name of these groups? Which function can help me for do this?
Thanks advance

Tho
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