Filter for new-message popup notification

[Luca Villa]

Is there a way to limit the Outlook new-message popup notification to
when the sender is in my Contacts or is one of my past messages
recipients?

 

[Brian Tillman]

Is there a way to limit the Outlook new-message popup notification to
when the sender is in my Contacts

I believe so.

or is one of my past messages
recipients?

I don't believe so.