[R] What's wrong with these mail headers?

[(Ted Harding)]

When moderating this message just now I forwarded it to
r-help-owner, for discussion.

In reply to Roy's question, there is indeed nothing obvious
which should "match a filter rule". However, the ETHZ spam
filter is somewhat sensitive about gmail, regardless of true
content, and there are 4 occurrences of "gmail.com", which
may have been responsible for it.

Looking at the headers of the original message (which was
sent out to R-help after moderation), the only indication
of problems is in the following:

X-Tag-Only: YES
X-Filter-Node: phil3.ethz.ch
X-USF-Spam-Level: **
X-USF-Spam-Status: hits=2.1 tests=DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU,
        FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,
        T_TO_NO_BRKTS_FREEMAIL
X-USF-Spam-Flag: NO
X-Virus-Scanned: by amavisd-new at stat.math.ethz.ch

in which the occurrences of "FREEMAIL" (associated with gmail,
nabble, yahoo etc.) may carry the clue, though they are too
cryptic for me to interpret! However, the "Spam-Level" was
not particularly high.

To Roy: Try not to worry about this. It happens from time to
time (including to people who are not mailing via gmail but
happen to be replying to a message that was mailed via gmail
and therefore their reply has "gmail" in ite header, e.g.
"References:" as in your headers below), and there is probably
nothing you can do about it! It does not happen every time even
to people who mail via gmail.

Comments from others would also be welcome!
Ted.

On 18-Dec-10 14:07:38, Roy Shimizu wrote:
> A message I posted recently was quarantined (pending moderator
> approval) because its headers "matched a filter rule."
> 
> I would like to avoid this sort of delay in the future, but as I
> examine these headers, I can't see what could have been the problem.
> 
> Here they are:
> 
> MIME-Version: 1.0
> Received: by 10.231.145.141 with HTTP; Sat, 18 Dec 2010 05:54:16 -0800
> (PST)
> In-Reply-To: <4D0B6C82.1030407 at yorku.ca>
> References:
> <AANLkTi=9j-xWd4r+LBJSBq9h+2d9pOBXWRg5cgWHnz3z at mail.gmail.com>
>       <4D0B6C82.1030407 at yorku.ca>
> Date: Sat, 18 Dec 2010 08:54:16 -0500
> Delivered-To: rshmz29 at gmail.com
> Message-ID:
> <AANLkTikHJT8T+Ao4qNj8ZrACubNk+hSPGA+JQG3o4hwG at mail.gmail.com>
> Subject: Re: Subarray specification problem
> From: Roy Shimizu <rshmz29 at gmail.com>
> To: r-help at r-project.org
> Content-Type: text/plain; charset=ISO-8859-1
> 
> 
> If anyone can tell what set off the filter, please let me know.
> 
> Thanks!
> 
> Hoping that this message doesn't get filtered too,
> 
> Roy
> 

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E-Mail: (Ted Harding) <ted.harding at wlandres.net>
Fax-to-email: +44 (0)870 094 0861
Date: 18-Dec-10                                       Time: 15:18:26
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