Day,
Right now I have no idea but am trying to figure out how to look into it.

Meanwhile, you can access the list on the web and forward each of the emails to yourself that you want to keep. Go into Messages and as you look at an individual message, there is a button or link to forward it. I realize this will be time consuming, but even if the next digest you get has messages in it, I don't think you will get a digest with the missing ones.

Kitty