Photo not visible in emailed agenda

Hi, 
I'd like to email a meeting agenda to members and include a photo. I uploaded the photo, and it shows up in the email on our free toast host site. However, when I send it to my Gmail address, the photo doesn't appear, just a blank rectangle.

Does anyone know how to fix this issue? 
I've already updated my Gmail settings.

Many thanks in advance,
Jenna, #2394

The url to the photo must be the full web address.

Thanks, Brian. When I upload an image to the server, it doesn't create a full URL. Is there a better way to do this?

if used on the website it is a reference url images/clubnumber/image.jpg
If used externally you have to put the full site url clubnumber.toastmastersclubs.org/images/clubnumber/image.jpg
 

The image I uploaded to the free toast host server has URL: 
 /imageuploads/2394/evaluator.png

When I add 2394.toastmastersclubs.org to the URL, the server no longer recognizes it? 

I feel like I'm missing a really easy fix...

2394.toastmastersclubs.org/imageuploads/2394/evaluator.png works fine