08:31:27 136 MSG 858486 Sender: xxxxx@xxx.xxx
08:31:27 136 MSG 858486 Recipient: yyyyy@yyy.yyy
08:31:41 136 Block checksum error (C04F)
08:31:41 136 The message was sent to the postmaster as attachment: fce7f9a4.765
08:31:41 136 The message was moved to: /gw/dom/wpgate/gwia/gwprob/4a9f7eed.BAD


Here's a piece of my GWIA log. The inbound message was not delivered. What's going on here?