Broadcast survey: invalid e-mail vs. no answer

Content

Hi,

After submitting a broadcast survey I'm wondering if there is a way to distinguish the recipients who have not yet responded from those whose address is incorrect ( for example having access to the mailer log to control bouncing mail or "non existent address" ).

I tried to send a survey to a non exixtent address, but the standard report say only "sent".

Thank you !

U.