Issue on email field

Hi,

I try to params in email field but I can't do what I want.

If, in sending options, I put "administrator", it works but I don't want this

if I put "this field value" , I must enter email in each record ! not useful !!

If I put "custom" and enter custom email , I have an error : Could not send mail. Email have not been entered.

Is this a bug for custom email ??

Thanks