Seriously though: if a spam checker can find a suspicious phrase, format or whatever, it can readily state the specific reason /why/ right there in their warning message...highlighting the portion in question. Instead of coughing up cryptic numbers which aren't really much help in figuring out what's wrong. This is too much like Windoze' useless error codes that are rarely helpful, and often perplexing and impossible to resolve.
As it now stands, I remain in the dark as to what, specifically, caused this alert. And you can't send them a false positive result to help them improve the service, unless you have a license from them...and that only applies to the ISP owner, not any of its users.
PS: Maybe the non-English word "Ullamaliztli" triggered an alarm somewhere in the bowels of their headquarters! :D