The email doesn't have a different From and Reply To, it has an email address where the sender's name should be. The author's complaint is that the sender claims to be one email, when it's actually from another.
Fair point! Although the name field isn't particularly sacred in its own way (your inbox may already be littered with things like "No Reply" or "Taco @ Trello").
I suspect this really comes down to spam filters. Most emails would generally avoid a shell game like this for fear of spam filters - but I imagine emails from Wikimedia have enough authority that they can get away with it more.
