Thunderbird Can’t Disable Notifications Selectively???

I can’t believe Mozilla Thunderbird doesn’t have an option to selectively disable new mail notifications (ie: you are on a high volume mail list and set up a filter for those messages to redirect to a different folder…AND…don’t notify me I have new mail when those arrive). And you know what’s even lamer than the lack of support for that? A bug was filed in 1999 requesting to add that feature. And its now nearly 2009? And the feature still isn’t there but is sidelined into a pile of “maybe in our next major release…maybe…”? Lameness. That’s something I’d consider a relatively basic feature.

Anyone know any open-source-ish type imap-friendly email clients other than Thunderbird that would do a better job at this?