[otrs] Duplicate reoccuring e-mails

Hello, Love the OTRS system, but on 9/1/2004 we are getting a couple e-mails that keep reappearing. One e-mail is a new e-mail and another is a response. Both are from the same person. The message reappears around midnight every night, but that is not the original time the message was sent. We have a mapping set up to pull messages from outlook every five minutes. I disabled the mappin to make sure outlook was not the problem. Even with the mapping disabled, the message still appear. Any ideas on what is wrong or where I can look to fix this issue.'' Thanks! Eric