Try the following steps (very quick´n´dirty):
1. configure the box as suitable with the "first installation wizard"
2. configure the bridge using the two interfaces (be sure to use the correct interface for "convert interface"!)
3. be sure to keep transparency activated (SMTP->Advanced)
I would personally prefer the long way: (not so dirty...) ;-)
1. skip wizard
2. build bridge
3. configure SMTP as suitable manually
Try the following steps (very quick´n´dirty):
1. configure the box as suitable with the "first installation wizard"
2. configure the bridge using the two interfaces (be sure to use the correct interface for "convert interface"!)
3. be sure to keep transparency activated (SMTP->Advanced)
I would personally prefer the long way: (not so dirty...) ;-)
1. skip wizard
2. build bridge
3. configure SMTP as suitable manually