User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030530 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030530 Some spammers use html mail with links to images through a cgi, giving the address as a parameter. This acts as a confirmation that the email address is valid. Merely viewing the email triggers it. Disabling remote image loading would prevent this. As an option, the user could click a "load images" button, just as if he was browsing the 'net with the automatic image loading turned off. Reproducible: Always Steps to Reproduce: 1. 2. 3.
*** This bug has been marked as a duplicate of 28327 ***
Note that most of it is already implemented ! - in [Preferences -> Privacy & Security], you can prevent the loading of remote images in mail. Embedded images can sil be shown. - we also have the [View -> Message Body As] menu, where you can choose Simple HTML and PlainText mode, but they won't show a full HRML page Bug 28327 is about the fine-tuning of this mechanism : you should be able to use normal HTML-mode, but you can still be sure that you won't accidently click on a link for instance.