The Gtkhtml2Viewer plugin is an HTML renderer plugin for Claws Mail. It features:

• Basic rendering of HTML message parts
• Displaying of attached images
• Optional fetching and displaying of remote images
• Remote image caching
• The ability to Reply to the message, quoting the selected text

libgtkhtml is required, ftp://ftp.gnome.org/pub/gnome/sources/libgtkhtml/
libcurl is an optional requirement, used for remote image fetching, http://curl.haxx.se/libcurl/

Here are a few screenshots illustrating the features:

• The preferences page.
  
   
   
• Gtkhtml2Viewer displaying an email containing a remote image, when preferences specify not to load remote images.
  
   
   
• Gtkhtml2Viewer displaying the same email, after clicking on the 'Load images' button.