In the event that the admin has erroneously learned a spam file as ham and vice-versa, don't worry. The admin can browse this file again and relearn it. For example, if c:\spam\message.txt was learned as ham by accident it can be learned as ham by browsing the same file, checking the Upload as SPAM box and clicking on Proceed With Upload. You will then see that the ham count will have been reduced by the number of spam emails contained in c:\spam\message.txt and the spam count will have been increased by this same number.