I have uploaded an HTML file, but I cannot see the images

You can correctly add an image to your messages without having to worry about writing any HTML code. Here are some quick instructions:

1. Just open the message in the editor page, click on each missing image and then click on the "Image Manager" button. From here, you can browse and upload other images.
2. As an alternative, you can copy and paste from a web page to the editor: doing this, the images will automatically have an absolute path.
3. Yet another alternative is to load the message from an URL (Email -> New, then the button is on top-right of the screen)