Report Post Email....Changing 'from' address?

[TalkPhotography]

When someone uses the Contact Us form, the email that comes through is from an email address (The members email address if they're logged in).

But whem the RTM function is used, the email comes from the forums mailing system.
Is there anyway to change it to come from the reporting user's email address?

We would like to be replying to the emails with a thankyou, but it's a bit of a pain, copying and pasting the email address etc, we'd like to just hit reply.

Thanks in advance