We have this happen multiple times over the last several weeks.
We currently have a Exchange 2003 Server for our corporate email. The server is on a Windows 2003 Server w/service packs applied. Exchange 2003 SP2 is running without issue. Over the last seval weeks it seems as though the system queue is getting stuck. I have system users call me stating that they have not revied an email message in several hours. I check the queues in the Exchange server to find that there are quite a few messages in the queue just waiting. I checked the error logs and the data line the system is running through only to find no errors. The only way we have been able to clear it is to reset the server. As soon as the server is reset, the mail begins to flow.
Not sure what is causing this issue but any help would be helpful.