If you open the .smx file in notepad. Or make a copy of it and add xml at the end you can read it more easily in internet explorer.
There is a section were the hostname is presented.
Go to Microsoft Configuration Manager folder then inboxes\auth\statesys.box\corrupt
You will see that it puts the files there.
Take the latest message and copy it to another location and add xml then open it in IE or any other browser, otherwise you can open the .smx in notepad directly.