Again, you can still accomplish this by asking him to email you in regards to D.
You are right.
My biggest reason for not is personal. It was a form of communication that his XW was relegated too because she would blow up his phone all day/night with repeated calls/texts. For our sanity it was ordered by a judge because if H wasn't answering his phone she was blowing up mine.
I don't want to be lumped into the "crazy XW bucket". I don't want to be lumped into the same group as someone like his XW ((she showed up at my door and threatened to hurt my then 8yr old child -- she was not stable)). I know my H does not hate me.... I can tell you he hates her (after what she did to her kids I don't blame him).
He hated dealing with email, but she could not be trusted to be reasonable.
So I'll probably get slammed for this too but we are both avoiding sending emails for this reason. :-(