Anyone sending an email to a specific distribution list(DL) named "sarp_xx" gets a bounce back from a specific email address. This email address belongs to a user that used to be in our global contact but he has been deleted and removed from the distribution list "sarp_xx". Attached is the error message. I believe that it is something cache on the server because email sent to that DL using webmail also bounced back. Clear autocomplete, disable cache exchange mode on the client, type in the dl address but none of these fixes the issue. Please help.