• Symantec Brightmail AntiSpam (SBAS) 6.0.5 or Symantec Brightmail Message Filter (SBMF) 6.1 or 6.2 has been upgraded to Symantec Messaging Gateway for Service Providers (SMG-SP) 
• The messages scanned by SMF have headers attached to them that are similar to the following format:
  
  X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrPLMWRWlGSWpSXmKPExsXyVPEml67RpR0+BlNesVksWjuD2YHR48GmNuY
  Axigum5TUnMyy1CJ9uwSujM7Ow0wF5hXHri5gamDU6mLk5JAQMJGY+X8dO4QtJnHh3no2EFtI4BijxPEj5iC2iICMxNzZj1lBbB
  YBVYlbF5eD2cICQhJPtp8Gq2cT4JDY9fQBywRG9gWMDKsYGY02MQKdxsTAwLCDcdVUrUOMAhyMSjy8r79s9xFiTSwrrsw9x
  CjJwaQkyrtJfoePEF9SfkplRmJxRnxRaU5q8SFGCQ5mJRHe9rNA5bwpiZVVqUX5MClxDjYlYd5JikBtPJl5JcWZ6TAZGQ4OJQle
  eZCMYFFqempFWmYOMJxg0kwcnCCCC2Q6D9D0BQpAhbzFBYm5SGZIcPACpeoXbQJlSQijD/FqMoxZ9O1TYxCLHn5ealS4rx
  3QBYJgPRnlObB7bnEKColzMsI9LkQT0FqUW5mCUT8FqMwx0MmqGZg2AAVMGgwPmIU5HjJLsTGxZSaJ8AqBZFtYFy94dYlr
  0X7RLLuh+aVTJooI7rvV83crxyLyg5MMxVs0WCJ8hO79+W43bOEZ01KlTlsk05F9dm6HXr3fCHPzx0bDLouX+vK5zjlcCajsWG7
  xArGxDNWX7Me/gnn+3osgr3G8rqZv2L/jRuRtfHL/tXE6bd520Tc/2wz10JC9KBK/fzk16fik5VYijMSDbWYi4oTARhePDpyAgAA

• Previously messages scanned by SBAS/SBMF have headers attached to them that are similar to the following format:

  X-Brightmail-Tracker: AAAAAQAAAWE=

 The X-Brightmail-Tracker format was updated with in release of SMF 6.3.  The expected size and format of the X-Brightmail-Tracker has changed to allow much greater information to be logged for each message scanned.

 This is expected behavior for SMF 6.3 and SMG-SP.