Ok, this is going to be a long one. But hopefully someone can help.
Our organisations mail exchange is configured as follows; We have 1 Exchange Server and two SMTP Relay Servers. Mail comes in through our Firewall and is redirected to 1 Relay server which in turn forwards all mail to the Exchange Server. The other Relay server is not yet configured but intend to use it for the following purpose. Instead of having our firewall use IP Redirection, we want to have these 2 Relay servers active and deliver all mail (inbound/outbound) using DNS. This purpose of this is so that if one relay server goes down, DNS will automatically switch over to the other relay server. I've already set up MX records on our DNS server for both of these. But I'm just really unclear on what I should do.
So to sum it all up, we want to have inbound mail coming from the firewall to be delivered to either of our relay servers which in turn will forward all mail to our single Exchange Server... all using DNS rather then IP forwarding. Then we want our Exchange server to forward all outbound messages to either relay server which in turn will deliver the messages outside to the public internet.. again all using DNS rather then IP forwarding.
Can someone provide some assistence here? I'm not that clued up on handling SMTP using DNS. But I have no problem handling mail using IP forwarding.
Thanks.
Our organisations mail exchange is configured as follows; We have 1 Exchange Server and two SMTP Relay Servers. Mail comes in through our Firewall and is redirected to 1 Relay server which in turn forwards all mail to the Exchange Server. The other Relay server is not yet configured but intend to use it for the following purpose. Instead of having our firewall use IP Redirection, we want to have these 2 Relay servers active and deliver all mail (inbound/outbound) using DNS. This purpose of this is so that if one relay server goes down, DNS will automatically switch over to the other relay server. I've already set up MX records on our DNS server for both of these. But I'm just really unclear on what I should do.
So to sum it all up, we want to have inbound mail coming from the firewall to be delivered to either of our relay servers which in turn will forward all mail to our single Exchange Server... all using DNS rather then IP forwarding. Then we want our Exchange server to forward all outbound messages to either relay server which in turn will deliver the messages outside to the public internet.. again all using DNS rather then IP forwarding.
Can someone provide some assistence here? I'm not that clued up on handling SMTP using DNS. But I have no problem handling mail using IP forwarding.
Thanks.