Due to the numerous ways addresses can be rewritten by gateways, a wildcard match is done. Actually this particular check is to prevent mailing loops in case a broken mailer somehow delivers the original message back to the sender (possibly through mail forwarding). With the duplicate mail suppression code it is no longer needed. You can edit it out of LSVXMAIL, or use some other trick like setting the IETFHDR option on the USS-L subscription to RUSS-L. Eric