In section Reports → Deliverability you can see the metrics downloaded for your domains from Google postmaster.
Google often takes quite a long time to process requests, so it can take about 30 seconds for data to load.
In the Deliverability report, you can customise:
Identification of critical values in columns:
Marked as spam - a red warning icon appears for values above 0.5%
Domain reputation - yellow icon for “Low” values and red for “Bad” values.
SPF Authentication - yellow icon for values below 100%
DKIM Authentication - yellow icon for values below 100%
Delivery errors - percentages for all types of errors are summarised. Red icon for values above 5%