Not certain why (fallout from the Heartbleed bug? something else?) but the last two O-list messages, which were both from Yahoo users, caused a tremendous number of bounces when the server tried to deliver them.
Everyone should check their spam folders for list mail, and please mark anything mis-filed there as "not spam"! If you thought there were no messages yesterday, well, you missed a few. I'm hoping this will settle out shortly... in the meantime, Yahoo users, be aware that people may not see your messages, and everyone else, watch your spam folder. Anne