Not really, unless you want to go poking around in the XML files in the new queue folder. The error message you've got indicates that there is an error reading issue responses sent via email rather than a problem in sending outgoing email. So what must be happening is:
Mail goes out from Aardvark to non-existent user.
NDR goes back to Aardvark email box.
Aardvark says oh, here is an email to import into responses, but it is the NDR for the original email.
You could do what I do as a workaround and set up an email rule in my mail client (Exchange) to send any NDRs to the deleted items folder when they arrive. They should be deleted before Aardvark runs its' message pickup cycle.