So to build upon this, I have a situation where I have a single WAN connection (External NIC) but it has multiple IP addresses bound to it. I need to have the SMTP PROXY send it's OUTGOING mail on a specific IP address, but there doesn't appear to be a way to do this. Is this still the case? Creating NAT rules won't work because the traffic is coming directly from the UTM (as the SmartHost), nor does creating a Multipath rule as that only applies to physical interfaces, not logical ones it seems.
So to build upon this, I have a situation where I have a single WAN connection (External NIC) but it has multiple IP addresses bound to it. I need to have the SMTP PROXY send it's OUTGOING mail on a specific IP address, but there doesn't appear to be a way to do this. Is this still the case? Creating NAT rules won't work because the traffic is coming directly from the UTM (as the SmartHost), nor does creating a Multipath rule as that only applies to physical interfaces, not logical ones it seems.
