I have a setup where currently a public IP that is different from the
WAN address is used for SMTP inbound. It is using Server NAT for the
inbound. Inbound is working correctly. However, when outbound, it
originates from the WAN address.
The machine that is accepting/generating the SMTP is currently the same
machine that provides inbound HTTP, but may change.
How do I configure the NAT so that outgoing SMTP originates on the
alternate address defined in Server NAT whilst other outbound is
originated on the WAN address from the same (internal) machine?
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