Hey Skye2014
I am not entirely sure if there is a wrong or right. But it seems like both (Email or post is fine)
One of my old co workers send his visa office the scanned in version of their CSQ. I geuss you should just mention all your information (UCI, outland application, Application number, and all the info you have). You could do this via "case specific enquiry"
I also posted the same question in an immigration forum on facebook and one person there mentioned that they printed it out and send the copy to their visa office. I have to say though, that out of 4 people 3 send it per email and one per post.
In this case it seems like you can do whatever you feel most comfortable with or you can call CIC to be sure
I hope that helped a little :-\
Also, @ayrazar Congratulations