Sending, receiving, and organizing email in Outlook.com
Greetings!
This is Tin, I'll do my best to help. Have you checked if you can receive email from other sender and if the issue is only happening if its from Netflix?
Kindly check the Junk/Spam Folder.
From your Mail app, please look for the Search bar and try to search Netflix and see if it will show the Netflix emails.
Please go to Outlook settings → Junk Email → Safe Senders and add @netflix.com.
If still not showing after that, please reach MSN Support to check your MSN account.
https://membercenter.msn.com/ContactSupport.aspx
Thanks,
Tin