You are right, it is better to play safe with CIC so that the documents don't get missed.
My parents used my email address for their contact info section when we submitted application. Now when asked for RPRF, we sent fee receipt to Ottawa from my parent's email account so that their name appears as the sender (we were over-worried if by sending it from my email account would create any issues as my name will appear as sender in CIC's inbox). Not sure if it was any better or worse than sending from my email account (the one that is mentioned in the application)
Grrr...I sometime feel puzzled as to how much worry or care one should take when dealing with CIC...how much is over and how much is just right!