partner 'CP' in vendor master & Notication

Hi,

I know this issue has been discussed earlier,

I trying to send email ( from Notification ) to vendor's QA department, There is a default email in address tab but vendor QA has different email address. So I have entered contact person (with email ) and assigned CP partner function.

But when I am trying to assign CP in Notification partner it pops that "

Best Regards,

G

Partner type of the partner function entered is not allowed.... what could be the work around.