Symantec Mail Security detected that you sent a message containing prohibited content (SYM:32487773651441470267)

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prohibited content (SYM:32487773651441470267)

Subject of the message: 66.164.232.0/24 HI-JACKED, I need some help
Recipient of the message: "NANOG" <nanog@merit.edu>

And what Symantec Mail Security detect?

Peter