How to change 'email notification' sender name

Dear sir,
My forum users recieve email notification with name of "board" . I want to change this sender name board to my site name . How can I do this.?

I don't believe you can change that.

Sanket wrote:I don't believe you can change that.

but some sites did that.

Oh well, can you post a screenshot of what you want to change? the default emails that go to a user when they register?

Thats the site name.
General>Forum>configuration
Site name:

thank you very much sir.. i changed..