Not currently, current functionality only mailes each individual post. There is also the subscription functionality which would email whatever was new.
If you want to try to modify it for this functionality, you might ask over at www.threadsdev.com
to see if anyone has ever done a modification like this. I don't recall any, but ya never know. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />