Unexpected Spam

[KJAdmin]

One of our customers sent us 6 copies of the same email that we did not consider to be spam. The Spam Blocker allowed the first 5 instances yet marked the 6th copy as Spam. Although we only needed one copy (and I'm sure the customer only wanted to send us one), did these multiple copies fool the Spam Blocker into thinking the last was a piece of Spam? I am concerned that this may induce more false positives in the future.

[dmorris]

Its possible that a spam update may have considered it spam (those usually happen at night).

Otherwise the opposite is true, if a person sends you a lot of good email, we use auto-whitelisting to "average down" their scores. In human speak, this means you tend to trust those mail servers than tend to send you legitimate mail. Since you're customer sends you lots of non-spam, his 6th email score would have been "averaged down."

Thats why I suspect that it set off some other rule.