I have a user who can send out meeting invatationsjust fine. We'll call her Jane. However, when invitees respond to Jane, they then receive an "Undeliverable" notice that a different user, we'll call Marry, cannot be emailed because the account does not exist in the organization. It is as if the meeting response it being sent to both Jane and Marry. Odd thing is Marry was deleted from AD a long time ago. I've looked in exchange and Jane's setting don't have any link to Marry either as an additional email address or a split delivery that I can find. Jane has no Outlook rules to send mail to Marry. I've watched message routing and the routing engine doesn't mention Marry.
"Normal" email does not behave in this way.
Any ideas are welcomed. Exchange 2003/Outlook 2007.