We can't mass-mail the 2014 authors via Elfmail now, because the active author flags are reset when MtYG moves into the reveal phase. It might probably be easiest to just get the contact mails from the public MtYG site -- every story should have a feedback mail address.

Were you thinking of limiting people to only their 2014 stories, or opening it for any MtYG story?

ETA: I'm being an idiot. I should have all the mail addresses already in the feedback spreadsheet. I'll check and mail them to you.