Login to the Enforce user interface and go to :
Manage > Policies > Policy list > Configure policy > edit exception.
These exceptions can be added based on the Recipient Matches patterns.
1. Email Address/Newsgroup Pattern (e.g., example.com,[email protected],cu,alt.example.com).
2. IP Address (e.g., 192.168.0.*,10.1.10.120)
3. URL Domain (e.g., mail.example.com,example.com)