Hi,
Are these out of office replies sent in response to legitimate emails? The BAP feature should only block bounces and out of office replies which were sent in response to spam emails with forged headers that did not pass through the Symantec Brightmail Gateway on outbound.
This is a common technique used by spammers - in the past 7 days on an hourly basis, there was a peak of 15% of all spam being sent via bounces and out of office replies. Spammers sometimes do this deliberately in order to have legimate mail servers deliver their mails and to increase the read rate of these emails.
Amanda