Hi Franc, this is neither a bug nor a feature. The way images appear in the content of an email depends on the editor you use in Joomla!. For example, TinyMCE, which is the default editor in all Joomla! installations, uses relative URLs instead of absolute URLs for images.

If images do not appear in the email, you can resolve this by adding your domain to the image links. For instance, instead of using "/images/myimage.jpg," you can manually update the link to " www.mysite.com/images/myimage.jpg " by including your website's domain name. (Replace www.mysite.com with your own domain name)

Can you try configuring the editor to use absolute URL?

If you're using TinyMCE, the editor can be configured to use absolute URL at Joomla! administrator > System > Plugins > Editor - TinyMCE > URLs

You're welcome, glad to hear it works