2016/ 8/10 11:56:07 SendQueryMailBox
2016/ 8/10 11:56:08 CDPClient::OnMailBoxReq bCheckTransMailBox:0
2016/ 8/10 11:56:08 CMailBox::Clear
2016/ 8/10 11:56:08 OnMailBoxReq : Fail Delete Admin_MailData.Temp
2016/ 8/10 11:57:51 CMailBox::Clear
2016/ 8/10 11:57:51 CMailBox::~CMailBox
Only the bold error is a real error!
It means that something with your MailBoxTempFiles is wrong. Maybe there are old handles to the files, so you can't access it or the Files does not even exists..
You should search for "_MailData.Temp" in the source to check the creation/handle of the file!
The other lines are only logs...