You can choose to only show notifications for your known contacts. This will disable notifications for emails that may be spam or marketing.

You can edit your email notification settings in the app settings (View) - 'Email Management' section - 'Email Notification Settings'.
Tap on the Filters button. Then you can turn on the 'Simple Spam Block List' setting at the bottom of the filter screen. Make sure the 'Notifications are on. Filters can disable notifications.' settings is turned on.

This will only show notifications for emails that are in your 'Known Senders' list or the 'Spam Safe List'. You can edit these lists in the app settings. View