We have two servers which are hosted in a colo facility. One (A) is currently
the primary mail server for a number of domains. I want to make the other (B)
the secondary server for these domains. Both servers have two LAN
connections, the second being used for an RFC1918 private network. I would
like to figure out a way of getting traffic to go from server A to server B
over the private LAN so that email which lands on B (which will be mostly
spam, sadly) and is thence forwarded to A travels over the private LAN (where
bandwidth is not chargeable). Is there any way of doing this, given that the
public addresses of A are not bound to the private network's NIC?
--
Niall
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