Well I use said product at work to filter out spam messages for our exchange server and well I was going through the logs and noticed something. An address was blacklisted one min and allowed through next. So I went home created a domain and started to send out emails my barracuda blocked them all saying blacklisted address. SO i put rwd: in the subject line and bam they started going through no problem. Heres what I tested it on.
Barracuda Spam Firewall 300
Firmware v3.4.10.087
Current energizer updates