When you posted about your involvement in this case a few days ago, I wondered if it was this email.
The strange part is that I apparently received a forwarded copy of that email. However, the distribution of that message was not "left-wing". It was sites like keepandbeararms.com, bloomfieldpress.com, and generally RKBA sites.
I never saw the message. It was sent to an email address that I used on web pages that have since been removed from my server. Since the only people still sending mail to it were spammers, I had set it to auto-report the mail as spam and then dump it in the bit-bucket.
I never would have noticed, until an FBI agent in Sacramento called me. He was checking out each email in the distribution, looking for a connection. Had I actually seen the email, I would have done exactly as you did.
I did see the originating email address: (emperorsclothes@hotmail.com) and the subject (motives behind violent political action in Red Bluff, CA.). So, the originator was apparently different, even though the subject was the same. So, I'm wondering if someone remailed the original message in an attempt to get the FBI to investigate/hassle pro-gun web sites.
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Toward FREEDOM