Some maillog question

[Wilson Kwok]

Hello,
   
  Can anyone help to explain the following MailScanner log ? is the mailScanner got hacking or something like that ?
   
  Jul  4 12:42:24 mailgateway MailScanner[22295]: Commercial scanner clamav timed out!
Jul  4 12:42:24 mailgateway MailScanner[22295]: clamav: Failed to complete, timed out
Jul  4 12:42:24 mailgateway MailScanner[22295]: Virus Scanning: Denial Of Service attack detected!

   
  Thanks

       
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