[Spambayes] Here's why "generate_long_skips: False" worked...

[Skip Montanaro]

I figured out why the false positive I saw was interpreted as text.  I had
been incorrectly forwarding mail from the itineraries@mojam.com command
processor alias (for probably five years or more).  This wasn't a big deal
in the past because I am the only person who receives such messages, but it
was incorrect nonethelss.  Instead of sending the original message out with
Resent-*: headers prepended, I sent a new message with the original message
as the body, e.g.:

    From itin@manatee.mojam.com  Tue Sep 24 15:34:42 2002
    Return-Path: <itin@manatee.mojam.com>
    Received: from manatee.mojam.com (localhost [127.0.0.1])
            by manatee.mojam.com (8.12.1/8.12.1) with ESMTP id g8OKYf0F013847
            for <skip@mojam.com>; Tue, 24 Sep 2002 15:34:41 -0500
    Received: (from itin@localhost)
            by manatee.mojam.com (8.12.1/8.12.1/Submit) id g8OKYfxH013839;
            Tue, 24 Sep 2002 15:34:41 -0500
    Message-Id: <200209242034.g8OKYfxH013839@manatee.mojam.com>
    From: itin@manatee.mojam.com
    To: skip@mojam.com
    Subject: New Itinerary: "nancy fly artist's tour dates" from mg@nflyagency.com
    Date: Tue, 24 Sep 2002 15:34:41 -0500

    Return-Path: <skip@manatee.mojam.com>
    Received: from txsmtp02.texas.rr.com (smtp2.texas.rr.com [24.93.36.230])
            by manatee.mojam.com (8.12.1/8.12.1) with ESMTP id g8OKYG0F013791
            for <itineraries@musi-cal.com>; Tue, 24 Sep 2002 15:34:17 -0500
    Received: from [192.168.0.4] (cs24342-228.austin.rr.com [24.243.42.228])
            by txsmtp02.texas.rr.com (8.12.5/8.12.2) with ESMTP id g8OKXano027834;
            Tue, 24 Sep 2002 16:33:36 -0400 (EDT)
    User-Agent: Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022
    Date: Tue, 24 Sep 2002 15:33:56 -0500
    Subject: Nancy Fly Artist's Tour Dates
    From: Martha Guthrie <mg@nflyagency.com>
    To: Tour Date Recipients <mg@nflyagency.com>
    Message-ID: <B9B63664.6CA%mg@nflyagency.com>
    Mime-version: 1.0
    Content-type: multipart/mixed;
       boundary="MS_Mac_OE_3115726436_766524_MIME_Part"

    > This message is in MIME format. Since your mail reader does not understand
    this format, some or all of this message may not be legible.

    ...

I just fixed that piece of code over the weekend.  Since I won't be getting
any new mail like the above note in the future, I suppose I should purge
them from my collection or adjust those messages to have the correct format.

So, should I pull the generate_long_skips option back out?

Skip