I have a user who recently created a distribution list in her local Contacts in Outlook 2003. When she sends email to this distribution list she gets an undeliverable message back from our Exchange server telling her The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address. The problem is that the address it is reporting as undeliverable is no longer an account on our Exchange (or Active Directory for that matter) and is definitely not a member of her distribution list. How is this deleted users email address attaching itself to this distribution list? Any help would be appreciated.