Question : How can I set up an auto-responder to let senders know that a new address should be used?

For several years, my manager has used boss@abcdomain.com for his primary address.  However, our company has since re-arranged and he would now like to switch over to boss@XYZdomain.com.

abcdomain.com still exists, while XYZdomain.com is for a company that has been newly created, and I have full control over both.  I've since set up forwarding such that any email that now arrives in his boss@abcdomain.com account is automatically forwarded to boss@XYZdomain.com.

But it would be nice if we could somehow set up boss@abcdomain.com so that anyone who sends to it gets an automatic reply with the message, "Please note that the NEW address used by 'boss' is boss@XYZdomain.com"

is there an easy way to do this?  Am I limited to Outlook rules?

Answer : How can I set up an auto-responder to let senders know that a new address should be used?

If your mail for both domains is sent directly to your server then you can do the following:

Setup a separate user account to handle the boss@abcdomain.com addresses and turn on out-of-office to tell them of the change of email address and that the message has automatically been forwarded, auto-forward the email from boss@abcdomain.com to boss@xyzdomain.com, then you will have your solution wrapped up.

If you get spammers sending mail to the old address, then there will be some rogue messages trying to be sent, but such is life.