anti-spam and mailing lists

[Zonesville]

My email to freebsd-java is being bounced with the following error:

Your message cannot be delivered to the following recipients:

  Recipient address: freebsd-java at freebsd.org
  Reason: Remote SMTP server has rejected address
  Diagnostic code: smtp;554 <truk at optonline.net>: Sender address rejected: Access denied
  Remote system: dns;mx1.freebsd.org (TCP|167.206.5.69|37826|216.136.204.125|25) (mx1.FreeBSD.org
ESMTP Postfix [Postfix Rules!])

What anti-spam lists are the mailing lists using? I'd like to know so I can try to get this
rectified.

Thanks,
-Kurt

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