I have this strange problem with two smtp connectors. We did updates in the weekend and after the updates the smtp connectors are not functioning properly.
What I've got is multi domain exchange 2003 environment.
On this server I've configured two smtp connectors.
The first does the address space of * with cost of 5, it uses dns to route traffic out.
The delivery restrictions accepts mail from everyone except one group.
The second has the address space of * with a cost of 10, it uses a smart host to route traffic.
The delivery restrictions reject mail from everyone except one group.
Prior to the weekend everyone would go through the main smtp connector except the memebers of the group which would go via the smart host.
Today everyone is going via the smart host (trying to), the smart host will only allow a specific domain so all mail not from that domain will bounce.
If I remove the smart host and use dns both smtp connectors work as they should, so connector 1 will deal with mail for everyone and connector 2 will deal with mail for that group. As soon as I change the 2nd connector to use the smart host suddenly everyone goes via the smart host as if its become a global setting.
I've run out of idea's as to what the reason is, I originally thought we had misconfigured the connectors and the updates had just stopped that but I know its configured correctly now, it's just not working since the updates. I've recreated the connectors, verified the restrictions reg key hasn't been unset.
I've double checked the smtp virtual server and it doesn't magically start using a smart host after the connector is changed.
OS is 2003 with SP2 and all updates up to march
Exchange is 2003 with SP2