We have one Exchange 2003 server with 3 email domains.
We want to automatically reply postmaster@emaildomain1.*, and reply postmaster@emaildomain2.* and reply postmaster@emaildomain3.* when a user sends a message to an unknown recipient.
Now 1 postmaster@emaildomain1.* is answering for the 3 email domains? How can we let the right postmaster to reply back to a sender to a unknown recipient?