Found temporary solution:
>From Kmail select an address
>Choose your group and click plus sign
>You will see entire list
>Click on first email and go to the last
>Hold shift key and click the last email. Your will select all
>Drag and drop the selected list in kmail mail field
Found temporary solution:
>From Kmail select an address
>Choose your group and click plus sign
>You will see entire list
>Click on first email and go to the last
>Hold shift key and click the last email. Your will select all
>Drag and drop the selected list in kmail mail field
Et Voila