I'm coming from Mulberry and Thunderbird and trying to manage an account with over 200 folders, any of which might receive new mail via a server-side filter. I have separate folders for each message source, including friends, mailing lists, customers, and vendors, as well as auto-generated mail from my servers.
I found the subscriptions_option plugin which lets me see all of my folders. Is there some way (another plugin?) to collapse the folder list to only folders with unread mail? With Thunderbird I can select All/Unread/Favorites. Usually, I want to see all folders with new mail. When I need to review old mail, I'll use the All or Favorites option.
