I am trying to get a trial version of GWGuardian to work with my mail
server, but inbound emails are not received. Outbound emails send fine.
To redirect SMTP traffic from GWIA on to GWGuardian on I simply change the Src/Dest IPs in my filters.

I am using BMgr 3.5, GW 6.5.4. I have set up two inbound and two outbound
static NAT filters, none of which are stateful. The in/out response
filters have ACK bit filtering enabled.

I can telnet locally to port 25 on the GWGuardian server and I can
connect to it locally using Outlook. Messages are received and passed to
GWIA without problem.

Any ideas?