How images work in HTML email When you code HTML email, you should use "absolute URL paths" for your images, so that they are downloaded from your web server when the email is opened. Images are never "attached" with your email, and they can’t be "embedded" in the message. They’re always hosted on a server, then downloaded when the email is opened.
If your images aren’t showing up in your HTML email, there are a few possible problems:
You can host images on Benchmark Email servers using the Image Gallery feature. If you need more than 10MB of disk space for your images, you need to upgrade to the premium image hosting option.