How to find this setting:
Trend Micro Anti-Spam Toolbar > Trend Micro
> Settings > Link Filter tab
Available only in select versions of Trend Micro security software.
Use the Link Filter tab to configure your protection against messages that contain links to potentially dangerous or fraudulent websites. These messages get moved into the Spam Mail folder automatically.
Mark the Activate Link Filter checkbox, then adjust the slider under Filtration Strength to control the detection rate.