I have a question:
Within the Internet Mail Connector on Exchange 2003 (SP2) I have a smarthost setup to forward SMTP mail to our 3rd party gateway servers. We have 2 of these servers (running MailMarshal but that's not really important).
I know that I can add multiple smarthost IP addresses to the IMC by seperating them with a semicolon. However doing this just load balances the mailflow, a bit like DNS round-robin I guess. What I would like to do is use the second IP address as failover ONLY. Does anyone know if you can change the behaviour of Exchange 2003 to do this?
If not then does anyone know anyway to use Windows DNS to provide failover rather than round robin? I know that SRV records can provide this type of functionality but are set to specific apps\client requests only. Would Exchange support SRV for smarthost lookup?
In summary I am not after a load balancing\round robin solution, just failover.
Thanks in advance