Significance of all-zero checksum counts

Gary Mills mills@cc.UManitoba.CA
Fri Dec 19 16:35:02 UTC 2003

I've had a few reports from concerned users that they've received
spam that had all of the DCC checksum counts set to zero.  What does
this mean?  In the example below, the message is single-part MIME
with an HTML body:

X-DCC-UofM-Metrics: electra 1032; Body=0 Fuz1=0 Fuz2=0
                                                      checksum  server
                       IP: 37b34952 3942d9e7 1bc9c7c7 bf9c24c7       0
                 env_From: 3019c707 e950e44b fd106a34 f10fc85d       0
                     From: 3019c707 e950e44b fd106a34 f10fc85d       0
          substitute helo: 18fb54bf a0bcb6fc c6e0a3fb 84facded       0
               Message-ID: 515fae6f e0c26521 671a2fea 4123b208       0
                 Received: cda9bed0 910ae3ec cf7f47b1 761d8968       0
                     Body: 7f2bf232 d47da12b 77b84615 584f371f       0
                     Fuz1: 0b7f555c 28c38932 2b991756 cdb8e881       0
                     Fuz2: 9f42a136 cd66abb0 031463a5 3fc07911       0
     substitute mail_host: d17b7dce bba81785 f4742784 9ccd5d88

       greylist recipient bb80442d 087737e0 194d8a4b a5462071 
                           5e3e6aea 702355d3 d062add8 5aabd443 Embargo Ended

result: accept

-Gary Mills-    -Unix Support-    -U of M Academic Computing and Networking-

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