I'm starting to "migrate" my aging SBS 2003 system to a shiny SBS 2008 one
although I'm actually doing a clean install on the 2008 box.
I like to take my time about such things where possible to ensure I've not
missed anything I may require from the old system, primarily relating to
mail setup, and in order to manage this I need to set up forwarding/relaying
between the two boxes as I only have one IP address to play with (this is a
home dev/learning system although I use it for all my comms etc.).
I have a few domains registered for different purposes and have two new
domains I'd like to configure on the '08 box which aren't currently
configured on the '03 box.
So far, I have the external NIC on the '03 box and the only NIC on the '08
box connected to the firewall/router device, with all port-forwarding from
the router to the '03 box.
Assuming "originaldomain.com" and "newdomain.com" for the purposes of this
post, I've configured "newdomain.com" as the "primary" email domain on the
'08 box, and olddomain.com is working just dandy on the '03 box.
I've successfully managed to configure SMTP smart-hosts on each box to
o Any mail sent via Outlook on the '03 domain to the new domain is
successfully received on the new box (verified with OWA on the new '08
o Any mail sent via OWA on the '08 domain to an email address on the '03
domain is successfully received on the '03 domain (verified with Outlook)
What I haven't yet managed is to get internet mail inbound via the '03 box
for the "newdomain.com" relayed/forwarded to the new '08 box.
Could someone point me to a suitable relaying article? The best I've found
so far is related to allowing specific IP addresses to relay which isn't of
any use when looking to receive from the internet.
In an ideal world I'd also like to be able to do the reverse in that, I'd
like to be able to switch the routers port forwarding to the '08 box and
then (whilst temporarily "fronting" it internet-wise) have it forward all
"olddomain.com" mail to the '03 box via smarthosts but I'm willing to
concede that it'd be somewhat harder to do on the '08 box due to the
(seemingly) more complex inner-sanctum that is Exchange 2007!