Today I found a great extension for Thunderbird that shows just one message in HTML format (not sanatized so use it with care). This will return you to plain text (or sanitized HTML if that was your default setting) for the next message. This is very handy.
The extension is avialable from Mozilla.
Only someone really slow would regularly view their email in HTML format because of security risks involved in HTML email and because most SPAM contains a unique counter “image” to tell the sender that you are reading your email. They see this as a green light to send more spam.
In Mozilla Thunderbird (get your copy at Mozilla.com) you can click on view, message body as, and select either sanitized html or html when you encounter a message that you do want to view in HTML format. The problem is that once selected, you need to then reverse the process to get back to plain text mode. No longer a problem with this extension installed.
