Symantec Brightmail 9.5.4 mail flow works

Hi,

I would like to know how the mail flow works for Symantec Brightmail 9.5.4 

i.e - which policies it takes first.

Currently I have SMG 9.5.4 below features are enabled

1. SMTP Connection  limit settings - enabled

2. Good Sender IP - enabled

3 Content Filtering (Block .exe, block sender, whitelist attachment) - enabled

4. Spam and Suspected Spam Score - enabled

5. Greylist Attachment (Quarantine)  - Enabled

Thanks