Update Required

If you are using firmware >5.x for your barracuda SPF appliance, the following changes are required/recommended

MIBs have changed:
$queue_in =`snmpwalk -v 2c -c $COMMUNITY $IP 1.3.6.1.4.1.20632.2.2`;
$queue_out =`snmpwalk -v 2c -c $COMMUNITY $IP 1.3.6.1.4.1.20632.2.3`;
$queue_deferred =`snmpwalk -v 2c -c $COMMUNITY $IP 1.3.6.1.4.1.20632.2.4`;

search/replace
bounced with deferred
MQ_B with MQ_DEF