My admin server is in a cluster. Both of those servers were brought down to move to another location. Then mail started acting weird. I could look up names in the corporate address book, but when the send button was clicked, it was looking for the admin server, then the cluster server (which it obviously couldn’t find), then gave an error that the server could not be found, keeping users from sending mail. Inbound SMTP was working fine. Any thoughts? Thanks in advance.
Subject: If the Admin server goes down, should mail still route?
All depend how you have your admin server and client configure. If you admin server is cluster and bothe cluster servers are doing then, users connecting to it will not be able to do name lookup, because the cluster servers are not available. If you have point the user to a third server then Name lookup would work fine.
The other thing is if you admin server were also handling SMTP mail, then , mail would stop routing. You should reconfigure another server in your domain to handle mail whiel you were moving the cluster servers.
Check your configuration, cluster server only work if atleast one or more server available to share the load…