Also,
Normally, You may get email around 4-5pm(SK Time). I guess its a automated process so most of the emails are sent at that time. Until now i haven't never received any emails before 5pm. I have received around 3 emails specifically about my application from email different that immigration@...... Make sure you save the email address to your contact. Normally further correspondence are made on official template, with your name, address, date of birth, and application number, in Government of Economy, immigration services letter head.
Also, if they require anything specif from your file, you will get email from starting SWO........@gov.sk.ca.
As i said above, this is the system's email so it usually send's email around 5, that's the time its synchronises.
Please note do not contact sinp more often, as this will only make your application delay, they have very less number of staff, recently, SK government curtailed the number of staff in their immigration services and other ministries. I found that they just have 16 staff at the moment among them 6 are immigration officer, so just think how long it might take for your files to be decided.
Thanks.