Re: Thunderbird does not display images in email messages

[Markus Schönhaber <fedora-users@xxxxxxxxxxxxxxxxxxxxx>]

For once HTML post on purpose.

Am 07.03.2015 um 11:47 schrieb Ed Greshko:

On 03/07/15 16:45, Tim wrote:

The sample you provided, on a later email, has some JPEGs encoded into
the message (as per the second description, above).  But you didn't say
if you were supplying a working or non-working sample.

It wouldn't make much sense for him to have supplied a working example, would it?  :-) :-)

Anyway, if you were to try view the mail in T-Bird you'd find it to be as originally described. 

I had a bit more time to look at this in the evening and I can see what is being "expected" of T-Bird.  If you look at the MIME headers for the images you'd these headers as an example....

Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Disposition: inline
Content-ID: <tAhk9iyMmm1CIfpU4g9p>

The "key" being the Content-ID. 

Then, in the text/html section of the message you'd find this sort of html snippet....

            <div class=3D"yiv3030508851ecxyiv7863957078MsoNormal" style=3D"=
BACKGROUND:white;"><span style=3D"FONT-SIZE:16pt;FONT-FAMILY:Arial, sans-se=
rif;COLOR:black;"><img id=3D"yiv3030508851ecxyiv7863957078_x0000_i1044" alt=
=3D"[]" src="" class="moz-txt-link-rfc2396E" href="">"cid:tAhk9iyMmm1CIfpU4g9p" width=3D"561" height=3D"405" data-=
id=3D"17bfaf0f-58fa-c795-9880-bde833a43cb7"></span>

Notice the cid:tAhk9iyMmm1CIfpU4g9p?  Which is referring to image via the "Content-ID"?  I don't know what standard defines this,

http://tools.ietf.org/html/rfc2392

 but it seems clear that the HTML engine of T-Bird can't handle this.

Thunderbird generally can handle displaying images referenced via a cid URL. I often get mails containing images which are referenced this way and are displayed correctly.
If you're viewing this post in HTML, you should see an image here (provided the list software hasn't stripped it) which is referenced via a cid URL:


Why this doesn't work in the provided sample mail, I don't know. Maybe (or maybe not) it's related to this:
https://bugzilla.mozilla.org/show_bug.cgi?id=61815

BTW: this mail is created using Thunderbird,

--
Regards
  mks

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