Transparent Firewall- Bridge on 5.3

[d c]

I have currently setup bridging on 5.3 p5 w/o too much effort.  It works as documented.
 
However I believe I am trying to do something that is not a function of bridging and I wanted to run it by the experts.
 
Essentially I want ALL traffic to pass through the bridge.  I accomplished this from the handbook.  However I would like to pickoff any packets destined for port 25.  Then I would like to forward them to 127.0.0.1:10025.
 
>From the googling I have done I have seen notes mentioning the bridge not handling "fwd" with ipfilter.  
 
Here is the rule I am using:
 
ipfw add 100 fwd 127.0.0.1,10025 tcp from not me to any 25
 
If I log it does show up in /var/log/security.
 
1.  Is there a special directive I need to use when processing layer3  on a layer 2 bridge ?
2.  Is the fwd command supported?
 
 
Goal:  Have a transparent device that intercepts all email and hands off to clamsmtp which is listening on 127.0.0.1:10025
 
Issue:  Packets do not seem to be making it to clamsmtp for processing.
 
 
Also-  Does handing off to the loopback on a bridge cause any problems.  Could I be making an infinte loop?  Anyway to set the rule to process in one direction only on a bridge?
 
 
Any advice / help / questions /comments would be greatly appreciated.
 
TIA

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com