That's the wrong address.
http://www.cic.gc.ca/english/information/applications/spouse.asp
https://www.canada.ca/en/immigratio...sponsor-your-spouse-partner-child.html#submit
Submit your application by mail
Send the application package with all the requested documents to the appropriate address below.
Note: all applications submitted by courier should be sent to the same address (see section for courier service below).
Pick the correct mailing address
Application for spouses, common-law partners or conjugal partners outside Canada
and all dependent child sponsorships:
CPC Sydney
P.O. Box 9500
Sydney, NS
B1P 0H5
Note: Choose this option if your spouse or common-law partner is living in Canada with you, but you have chosen to use the overseas sponsorship.
Submit your application by courier service
If you’re sending the application using a courier service instead of by mail, pick the correct courier address (no public drop-offs):
Application for spouses, common-law partners or conjugal partners currently living outside Canada
and all dependent child sponsorships:
CPC Sydney
49 Dorchester Street
Sydney, NS
B1P 5Z2
Note: Choose this option if your spouse or common-law partner is living in Canada with you, but you have chosen to use the overseas sponsorship.