Outlook.com is blocking emails from unknown senders. How to turn off?

I'm trying to switch from Gmail to Outlook.com. I have currently setup email forwarding on Gmail to my Outlook.com account. Gmail is properly forwarding emails, but I'm not receiving lots of emails in Outlook.com. They just disappear. I can't find them in the Trash nor Junk folder. I've cleared my list of blocked senders and tried every possible options in the control panel, but I'm still only receiving emails from senders that are in my contacts. I've sent the Junk filter to standard and it still doesn't work. Something is blocking emails that I want. This is rather frustrating. I'm still keeping a copy of all email in my Gmail account and I have to keep checking my Gmail account for emails and any given day I have a number of emails that just don't show up in Outlook.com. I appreciate SmartFilter and Junk filter and all that, but if it's blocking legit emails, then this **** is broken!!!! Hope somebody from Microsoft can help me with this.