I've got my fingers crossed too.
www.macwindows.com/Mavericks-10_9_2-adds-fixes-for-mail-and-SMB2-file-sharing.html
"Apple says that the 10.9.2 release "includes general improvements to the stability and compatibility of Mail. Apple does say that the update "resolves an issue that prevented Mail from receiving new messages from certain providers."
I will have a few guinea pig users test and post back with results.