Simple, Fast, Effective Rated 5 out of 5 stars
This does exactly what I wanted. With one key, I can send mail to whatever predetermined folder I've chosen. If there's no filter set up, it pops up the filter creation window to make one.
In another email client (Evolution), I did the same thing by creating filters that only applied if the mail was read, then manually applied filters, but it was much clunkier and much slower.
The one feature I would like to see added is a block to stop processing any mail that is unread or starred. An alternative would be allowing the filters to have multiple conditions that must be met (which could then include the read status, for example).