Mail received, but no entry on Message Audit Logs

Hi,

We have messaging gateway which send mails to our lotus notes mail server. On lotus mail server log, I can see that the messaging gateway delivered the mail based on IP; but when I check on messaging gateway by sender or recipient, I do not see any entry. Is there a way to check all emails that have been received by the messaging gateway. With Message Audit Logs a particular search can be done, I would prefer having list of all mails received.

Thanks to help!