>We adjusted recently to improve our score in order to avoid being interpreted as spam. This has resolved the issue. However, the tool you are using seems to be much more severe. I would have to see about the ranking to see what I need to improve.

I do not know, why SBC Yahoo treats UT and some other good messages as spam. I received lots of spam messages originated from Russia one day, which were filtered. But now I'm not receiving SPAM at all, I have a "false negative" situation :)