It seems that you have received a virus infected email and our virus filter has detected it and removed all the dangerous content (the message) and replaced it with a report. Since the head lines are the same as the original message then you can probably see which computer (IP address) that is sending virus messages and there is probably someone who has your address in their address book.
Modern viruses are looking through the entire system on an infected computer for email addresses and choosing an address in the crowd to set as the return address. The “sender” usually has nothing to do with this kind of emails. The sender receives no notice that our virus filters have blocked the message.
The virus report that tells you what viruses that have been detected in the message.