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Hello:

I've just send a message to the list 2 days ago, and received a reply with
the following reason:

  Message has a suspicious header

Could somebody tell me what exactly does it mean? i've sent it from my
e-mail account, with a descriptive subject, not giving any url or something
else, just a few questions...so i think i've triggered a false positive on
some filter :?

Thanks in advance,
Regards.
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