Domino mail monitor on specific IP

Our domino server allows outgoing external internet mail to authenticate user only (user ID and Password). One of our non domino servers uses our domino server as a mail gateway (relay) to send some external internet mail. We allowed this server in our Router/SMTP, SMTP inbound control, Allow messages only from the following internet hosts to be sent to external internet domains and Exclude these connecting hosts from anti-relay checks. Working fine.My Q is, is it possible to get all mails send by this non domino server and put those mail in a database for monitoring using this server IP or HOSTNAME by mail rule or any other way?

Sorry for my immense query. Thanks to all.