Norton AntiSpam now flagging commonly received email addresses in Outlook- even my own

Outlook 2013

Norton Internet Security

 

For the past 2 weeks or so emails from folks in my address book and already in correspondence have been ending up in the Norton AntiSpam file in Outlook.  Even my own today! Some are also immediately being deleted.

I have checked Rules, have just done the latest patch and rebooted, and checked with my host: emails are on the server and coming into my iPhone... but in Outlook some are being flagged or deleted immediately. And it's inconsistent.

Thoughts??  Thank you.

PQ