When a user asks a question about a product, the reply adress is not the emailadress the user entered in the form. So I need to copy-paste that from the form content. This used to work in previous versions. I hope this gets fixed in a future version.
What version are you reporting here? I have noted such an issue with VM3.0.3 and have reported it to the developers.
VirtueMart 3.0.0