Thunderbird does not display images in email messages

[Tim]

On Fri, 2015-03-06 at 17:34 -0700, jd1008 wrote:
> I have been having a problem with TB for quite some time,
> and I am getting rather tired of the problem.
>  
> Images in messages that are sent to me by users of windows
> are not displayed in TB. Rather, all I see are empty boxes
> where images are supposed to be.
>  
> This is not to say that every message I get from windows users
> containing images are treated this way by TB.

There are three ways messages may contain images, that I can think of
off the top of my head:

1. A plain text message, with files attached.  But this doesn't sount
like your situation.

2. A HTML message which has the images included with the email.  These
may be the kind that works for you.  Though there will be some mail
clients that simply create badly encoded mail, and will fail unless you
use a similarly broken mail client.

3. A HTML message which doesn't include the images with the email, but
has URIs for fetching the images from a webserver.  These may be the
kind that don't work for you.

Also, most mail clients that author HTML email, create a simultaneous
plain text version of the message.  Some mail clients can be configured
to show one or the other, as a preference, for these kinds of messages.
If you're viewing the plain text version, you won't see the images in
the message.

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.

Various mail clients give you options for dealing with images in
messages, such as always showing them, never showing them, never
downloading images from the net, or always showing images for certain
people you've okayed in your address book.  You may need to look through
your VIEW menu in the message reader, and some entries in your address
book.

These days, there's a tendency for the default being to not download
images from the net, automatically (you instruct the mail client to
fetch them, if you want them, while reading the message).  This being
due to these images being used for nefarious techniques of one kind or
another (monitoring that you've read the message, exploiting foibles in
mail clients with specially crafted data, etc).

-- 
tim at localhost ~]$ uname -rsvp

Linux 3.18.7-100.fc20.i686 #1 SMP Wed Feb 11 21:16:53 UTC 2015 i686

All mail to my mailbox is automatically deleted, there is no point trying
to privately email me, I will only read messages posted to the public lists.

George Orwell's '1984' was supposed to be a warning against tyranny, not
a set of instructions for supposedly democratic governments.