No thumbnail image showing when posting by email

[chris]

Dear Nabble support and members,

Thumbnails display an image when I post from within Nabble, as you can see below:


But when I post an image by email, thumbnails display the following:


http://flying-birds.60396.x6.nabble.com/ As you can see it looks messy and may confuse visitors.

So my question is:
How do I stop this from happening?  The post to email feature is integral as I need to upload multiple images simultaneously, otherwise it will be too time consuming.

The following user has a similar problem http://support.nabble.com/Possible-to-display-JPG-attachment-in-email-td7589178.html#a7589356 

Thank you.

Chris