Messaging Gateway connection to Symantec DLP

Hello, I have configured Messaging Gateway connected with my Symantec DLP, so all emails now sends to DLP for analyse. The issue accrued when I turn on journaling in my main mail server (journaling server is separated stand alone mail server) and starts bulk emailing. Because of huge amount of emails the queue is increasing and emails sticking in mail server. So, is there any possibility to exclude some email addresses (especially journaling address) from checked by DLP. I am added exclusions in all policies in DLP but it don't help. I just want don't send all emails from journaling service to DLP. Is it possible?