I’m sure you all have a hundred or so messages titled re: Roll Call? To help everyone in finding pertinent clues to their own tree may I suggest you title each message with a hint to its content.
Eg if you are responding to a message about a person, family, location put that in your subject!
I am finding it difficult to collate hints in other’s e-mails and they are important so please put the subject of your response on your e-mail!!