On Mon 22 Jul 2019 at 15:48:08 (-0400), rhkra...@gmail.com wrote:
> On Monday, July 22, 2019 11:52:59 AM Greg Wooledge wrote:
> > On Mon, Jul 22, 2019 at 11:40:59AM -0400, rhkra...@gmail.com wrote:
> > >    * but when I view source in my email client (kmail 3.n), I see just
> > >    the "*
> > > 
> > > From: Reco" that I see when viewing the email "normally".
> > > 
> > > So, it seems, something is filtering out a lot of the content of the
> > > email before it gets to me (I don't think anything else in my system
> > > would be filtering anything out -- emails come directly from my ISP to
> > > my email client.
> > > 
> > > A mystery that I won't dig into any deeper for now.
> > 
> > Well, there are two possibilities.  One is that the messages are actually
> > being truncated during transmission.  The other is that your email user
> > agent is not showing you the full message text.
> > 
> > The obvious way to figure out which one it is would be to read the email
> > in a different way (cat, less, mutt, mailx, ...).
> 
> Ok, that fooled me -- I expected that the kmail command "view source" would 
> let me see the entire email regardless of how it might be "rendered" in the 
> kmail text box, but I was wrong.
> 
> When I view that email in kwrite, I see all of the content, and, then around 
> the email address (recovery...@enotuniq.net, after the *      From: Reco in 
> the 
> body of the email I see two characters that look like triangles -- I'll try 
> looking at those in hexedit...
> 
> Ok, it looks like there is a 0x00 in the byte before the email address (which 
> is presumably disabling all further rendering in this version of kmail 
> (1.13.7, on kde 4.8.4), and a 0x09 in the byte after the email address.
> 
> So, I guess I have a way to send secret messages (to, at least, myself ;-)

Here's what I see in mutt:

  Date: Mon, 22 Jul 2019 06:32:36 -0700
  From: pe...@easthope.ca
  Subject: Re: HTTP shimmed to HTTPS
  X-Original-To: deb...@lionunicorn.co.uk
  X-Original-To: lists-debian-u...@bendel.debian.org

  *       From: Reco \200recovery...@enotuniq.net\200
  *       Date: Sun, 21 Jul 2019 10:47:18 +0300
  wget -O - http://<siet>

  curl -vL http://<siet> >/dev/null

  nmap -sT -p 80 <siet>

Running emacs on the cached message, you can of course get help on
that that \200 actually is. I attach the result because it probably
has raw occurrences of the problematical character within it.

Cheers,
David.
             position: 6244 of 12653 (49%), column: 19
            character: � (displayed as �) (codepoint 4194176, #o17777600, 
#x3fff80)
    preferred charset: tis620-2533 (TIS620.2533)
code point in charset: 0x80
               syntax: w        which means: word
             category: L:Left-to-right (strong)
             to input: type "C-x 8 RET HEX-CODEPOINT" or "C-x 8 RET NAME"
          buffer code: #x80
            file code: #x80 (encoded by coding system raw-text-unix)
              display: no font available

Character code properties: customize what to show
  general-category: Cn (Other, Not Assigned)
  decomposition: (4194176) ('�')

There are text properties here:
  fontified            t

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