If any of my users receive a mail with CC addresses specified, the server instantly forwards/relays the message to the CC Recipient. Consequently the CC recipient receives two copies of the mail. Both appear to have come from the original sender however examination of the headers reveal that one came from the originator whilst the other was despatched by our (receiving) server? At a complete loss - fully SP'd and patched; No open relays; No mailbox rules running. Help!!!
