I don't know if this has been addressed but what if you compromised and said he can send whatever he wants to his family and a specific list of friends, and you will send whatever you want (or not) to your family and a specific list of friends?
A letter presenting simple facts would sound like the J-Lo and Marc Anthony divorce announcement and would not require that much detail. It's really not helpful for you all to advertise who wants the divorce, especially if you hope to eventually reconcile.
Sorry you're dealing with what looks to me like a really stupid issue, but the sooner you can get it off the table the better off you both will be. As long as this is hanging over your head it's going to be hard to react reasonably to anything else.
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15