I don't know if this is new information or not. Recently, I tried to post to
tweeters and received a note back that my post was in an HTML format,
whatever that is? I also had the same problem on another list that I belong
to. The fix to allow your posts to be accepted is pretty easy. After you have
typed your post and before you send it, use you cursor to hi-lite your text,
after it is hi-lited, right click your mouse button, move your cursor onto
the menu and hi-lite TEXT, an additional menu appears, move your cursor to
Normal and left click. That's all it takes. Good Luck

Toby Andrews