--On Sunday, August 26, 2007 11:31 AM +0200 Kai Schaetzl
<[EMAIL PROTECTED]> wrote:
For instance the two MX
setup where one machine is behind a firewall and a gateway machine is
first MX and forwards to the machine behind the firewall. This is an
accepted setup. Couldn't I achieve the same thing without a firewall?
The first MX gets another IP from a private range and the second is on
private only. So, it's not reachable from outside, but the first MX can
forward to it.
Publishing a private address in a public MX record can lose mail. If the
outside sender is using the same private address for his own mail server,
then that server will either see a routing loop (since it's being told by
MX that it's responsible for that mail) or it will reject the mail because
it's not configured to forward or deliver for that domain.
