darinmarshall posted Enable auto-loading of remote content (images) in Thunderbird 2.x or 3.x | Dec 11, 2009
This is a weird issue that has bugged me for a long time about Thunderbird. By default, Thunderbird tries to protect you by not loading the images that are sent in email messages. Many of these images are innocuous and don't really matter. The ones that do matter are typically 1x1 pixel tracking...