OT - "HTML attachment was scrubbed"

[Lew Bloch]

I often see messages on this list that read only (for example):
> Message: 5
> Date: Sun, 03 Oct 2004 11:56:42 -0500
> From: Carlos Davila <cedavila at comcast.net>
> Subject: Re: EZ-Drive instead of NFTS
> To: For users of Fedora Core releases <fedora-list at redhat.com>
> Message-ID: <41602F4A.706 at comcast.net>
> Content-Type: text/plain; charset="us-ascii"
> 
> An HTML attachment was scrubbed...
> URL: /archives/fedora-list/attachments/20041003/c61659f6/attachment.htm

  then no message whatsoever.

What does that signify?
Does the "URL" notation mean that the 'attachment.htm' is visible on the 
archives?

Just a WAG, but is this a result of using HTML email to post to the list?
An inevitable result?