I'm having strange situation...
I have configured my ISP email account to forward all messages to outlook.com account and I noticed that I don't receive all messages in Inbox or Spam folder.

Right now I purchased something and paid via PayPal but didn't received any order confirmation or PayPal reciept.

A friend sent me some mails few days ago which I also didn't get but I didn't believed him until he showed me his sent folder, but now I'm sure there is something wrong here.

I don't have any active filters and my ISP mail account is configured to unconditional forward.
Even PayPal service address is whitelisted.
This setup worked just fine with GMail so far.

Any thoughts, ideas???

Regards,
Karlo