Not receiving email notifications for forum Subscription topics

I have all the settings for Email Notifications and Subscriptions to topics, but receive none. 

I can come back here - login - and the "bell" has some numbers to review....

BTW - when I click on the "bell" it's hard to determine which topics are newly tagged for reading ?

Anyway - I'm not receiving Notifications, and not in Spam - it might be that the Forum email server sending IP is flagged and blacklisted somewhere as creating Spam -