We currently are supporting four email domains: @domain.net, @domain.org, @domainmail.university.edu, and @domain.university.edu. We want to phase out two of these domains, but provide automatic responses to senders informing them of the change.
For example, when an external email comes in for @domain.net or @domainmail.university.edu, we would like to automatically respond to the sender with an email asking them to update their contacts with the @domain.org address and still allow their original email to continue on to the recipient.
We are currently using Exchange 2000.
Any ideas on how to go about doing this?