Our client is changing their email domain and would like emails sent to the old domain to auto reply with a message that says the domain name has changed. Due to legal requirements, I cannot keep the old domain active. Can this domain wide autoreply be done in Exchange 2007?

I assume you can keep it active for some limited period of time. I would look at something like: Exclaimer

Thanks Fiona but I don't see a way to create a transport rule that applies to a specific domain. Is there another to have a rule apply to a specific SMTP domain?