From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Wright <mike.wright@mailinator.com>
Subject: Re: netfilter mailing list: rules
Date: Sat, 16 Mar 2013 08:36:01 -0700
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To: Konrad Vrba <konrad.vrba@gmail.com>
Cc: netfilter@vger.kernel.org

03/16/2013 02:08 AM, Konrad Vrba wrote:
> Dear list,
>
> I am trying unsuccessfully to post a message to this mailing list. As
> one would expect, my message to netfilter mailing list contains
> snippets of iptable rules. Unfortunately my message is rejected with
> the following error:
>
> "The message contains HTML subpart, therefore we consider it SPAM or
> Outlook Virus"
>
> Could somebody please explain what I am doing wrong ?

Is it possible you are posting HTML mail?  Try sending in plain text.

I don't know about this list but many lists have specific rules against 
HTML mail such that those emails will be blocked at the server, filtered 
at the client, or just not answered.  Sending an embedded web page to 
thousands upon thousands of people has been known to push people over 
the edge.  Just saying...