On CIC website there is another Address mentioned: (http://www.cic.gc.ca/english/information/offices/canada/sydney.asp)
Centralized Intake Office – Federal Skilled Worker (FSW)
P.O. BOX 7500
Sydney, NS B1P 0A9
Canada
and at the end of same page they have mentioned:
Courier address
Centralized Intake Office
49 Dorchester Street
Sydney, NS B1P 5Z2
Canada
I want send docs through India Post World Net Express Service, confused that on which address I will have to send ???