For those asking, the PPR mail came from the Local Visa Office where I need to submit my passport. Honestly, at first I thought it was a fake mail, being sent in the Spam Folder. I read the body of the email to check for wrong grammar or spelling or information (like wrong UCI or application number). But everythings's correct. The sender is
MANILIMMIGRATION@international.gc.ca
But please note, that email address is the local email address of manila visa office. I had to check the CIC website to ensure that the email address is legit. Others may need to check the email address of their local visa offices in the CIC website so they can tag the email address as not a spam sender or something (I don't know how they do it in gmail).
I'm sharing my experience so everyone would know the possibility that the PPR mail could in fact be sent in other gmail folders. It might be sitting in other folders for quite sometime without the person knowing. Mine was sitting there for 8 days. And I only have 30 days to submit my passport. Good thing I was able to check my Spam Folder on time.
So, yes, guys, there are a lot of unexpected possibilities. I'm not playing a prank like one user in another group accussed me of.
Good luck to everyone and let's hope for positive results for everyone.