Figure: Symantec Brightmail Gateway Architecture shows how Symantec Brightmail Gateway processes an email message. This diagram assumes that the message passes through the Filtering Engine to the Transformation Engine without being rejected. The diagram also shows the path IM traffic takes through the system.
Figure: Symantec Brightmail Gateway Architecture
Symantec Brightmail Gateway does not filter any messages that do not flow through the SMTP gateway. For example, it does not filter the messages that are sent between mailboxes on the same Microsoft Exchange Server. Nor does it filter the messages on different servers within a Microsoft Exchange organization.