Proofpoint Messaging Security Gateway V4.0 was released in March, 2006, with additional capabilities such as directory harvest attack prevention features and enhancements to the Proofpoint MLX Dynamic Reputation software.
Proofpoint Messaging Security Gateway V4.0 был выпущен в марте 2006 с дополнительными возможностями, такими как защита от DHA-атак и расширение технологии Proofpoint.