I just upgraded to 6.0.1 (from 5.2.3) and find that I can't sent email. That is, a client (192.168.0.4) on the LAN attempts to send email to the server (192.168.0.1) and is told that the SMTP server is unavailable or is refusing connections.
When I check the bindings in the "SMTP Proxy Server" service, I find that there are no bindings whereas there should be bindings to 192.168.0.1:25 as well as 127.0.0.1:25.
This works correctly with 5.2.3. What should happen is that WG should receive SMTP connection on one of the two above-mentioned IP:ports and then send it on to MDaemon on 127.0.0.1:8025 which processes the outbound email and queues it for later delivery (to 127.0.0.1:9025). This is supported by setting the General tab in this service to have outbound mail sent to 127.0.0.1:9025 and inbound mail via 127.0.0.1:8025.
Oddly enough, both "SMTP Proxy Server" and "SMTP Connection-specific Proxy" services have the same Binding Policy ("Bind to any IP address on any internal adapter" and "Bind only to 127.0.0.1 ..."). The former Service has no bindings listed in the Adapter/IP Address/... window (incorrect) and the latter has both 127.0.0.1 and 192.168.0.1 (correct).
Any help would be greatly appreciated.