We are having a problem with a few users where they receive an email from outside the agency and when they try to open it they get a message that says "Operation Failed" and then the message disappears completely like they never got it. I have also had the message disappear as soon as it arrives in my inbox. I get the message notification and it even says I have unread mail but the message is gone. It is not a rules issue, we have verified this. We do not know what the problem is. It happens with emails with and without attachements from outside addresses. We also do not think it is our anti-virus (Trend Micro) as we have reviewed the logs and it does not show that it has taken any action. We can see the emails come in to our spam filter and then go to the exchange server and get delivered. It is something at the end users account. We would not have believed this had we not tried it on one of our (IT guys) computer and got the same thing. It does not seem to happen all of the time, but we can't see what could be causing it. We are using Outlook 2003.