Improvements in Email Protection Comes with TMG Firewall Service Pack 2
Have you installed service pack 2 of the TMG firewall yet? If not, you might want to test it out and then go ahead and deploy it.
This is especially true if you are using the Email protection features included with the TMG firewall.
For more information, check out Yuri Diogenes blog over at:
DEBRA LITTLEJOHN SHINDER
MVP (Enterprise Security)