It is wonderful that Claws gives the option in preferences to select how HTML messages and attached pictures are displayed and when (and with the optional plugins). However, there are parts that can be improved... especially for users that are less savvy. I am basing these suggestions on a decade of watching and helping hundreds of typical users interact with Sylpheed/Claws. I will preface by saying I am not fond of html messages, but accept it is part of the landscape and we have to deal with them and help users see everything important in the content relayed to them. 1) If a user is set to display plaintext by default: It would be nice if there were an optional warning on the bottom of the message/button that told the user something like "an HTML version is available, click here to display it". Many users simply don't understand HTML parts that are shown on the attachments or how to deal with them. This would make it much easier. 2) If a user is set to display html by default and external content were not allowed by default: It would be nice if there were an optional warning/button on the bottom of the message that told the user if external content is detected in the message and what action is available. For example: "External content disabled for security- click here to load it anyway". 3) For attached Image Viewing, it would be nice that instead of just yes/no to "Automatically display attached images", there were a third option... "Attached Images: " "Automatically display", "Never display", "Ask user to display if present". Some of these concepts are implemented in KMail and other mail clients (differently, of course) and seem to work quite well. As usual, it is better if these types of additions are optional and selectable in preferences so as to be useful for new or casual users, and not annoying for expert or veteran users. Unfortunately, it is a bit unclear as to where such preferences or code would be placed- in the plugin or in the main program.... In "Fancy HTML Viewer", there is a nice control at the bottom, but it does not really tell the user anything about what is going on unless they interact with it. It is more of an action selector. The typical, less-savvy user will not know they are not seeing everything available. In both "Gtkhtml2 HTML Viewer" and "Dillo Browser", there are no controls or warnings at all. Perhaps these are too many ideas to combine into one enhancement request, but they are related in concept. If people like the ideas and want to act on them, they could be split into several requests- one for each HTML plugin, and one for the main Claws preferences.