Messaging Gateway

The good sender groups reduce the risk that messages sent from trusted senders will be treated as spam. By default and generally the messages from these senders are delivered normally.
Senders in Good Sender groups always use the best class (Class 1). Senders in Bad Sender groups always use the worst class (Class 9). So the senders who are members of the Local Good Sender IPs or Symantec Global Good Senders sender groups cannot receive a pass. However, those senders are already exempted from spam scanning. Although Symantec Messaging Gateway will not filter messages from this IP address for spam, the messages will undergo all other filtering, including antivirus filtering or content filtering with the actions customized by the administrator.
Specifically if the local good sender triggers will skip the following filters:

•  Third party bad senders
•  Symantec Global bad senders
•  Local bad sender IPs
•  third parties bad sender
•  spam
•  suspected spam
•  newsletter filtering
•  marketing email
•  suspicious URL --> so I presume you should receive the spam messages I sent like evidence.
•  Sender Auth failure
•  local bad sender domains
•  When the associated policy specifies a Bypass content filtering policy action:

1.   Local Good Sender Domains
2.   Local Good Sender IPs
3.   Third Party Good Senders
4.   Local Bad Sender Domains
5.   Local Bad Sender IPs
6.   Third Party Bad Senders
7.   Symantec Global Good Senders
8.   Symantec Global Bad Senders
9.   Spam
10.   Suspected spam
11.   Unwanted email
12.   Sender authentication failure