I can’t tell you how much time I have wasted telling people how to overcome the auto-configure of IMAP in Thunderbird since 3.0. People often want POP3 but cannot get it to install — it locks you into IMAP, or so you thought until you read this article over at http://blogwranglers.com.
That, plus the fix for outgoing Thunderbird email line-wrap issue I recently wrote about, and finally re-finding the “Allow HTML Temp” add on make Thunderbird nearly as functional as it used to be once again. Granted I don’t like the new Allow HTML Temp as much as the old one because it doesn’t offer the three pronged choice of text, safe html or html like it used to. It still allows that functionality because it starts in safe and you need to allow external content to download — it just isn’t as convenient. What it does is turn on html only for the current message and back off again vs using the built in view > message body as > text/simple html/html that then stays on for all messages when you simply wanted it for one message.