Why not just have an easy button that you can click saying Do Not Allow Reply All?
I know that there are some ways you can limit reply-all availability, like in the URL linked here. But there’s a note: If recipients open this email in other mail applications except Microsoft Outlook, such as opening on web page via web mailbox, they can reply all this email.
I’m semi-tech savvy but I’m no programmer. It feels like it should be easy to do, so either I’m totally wrong or email services are really missing out on a great thing they could do.
Yeah, I used to manage a Google account for a school district. I was able to disable the reply all for certain groups. My solution was to disable it for all groups except for one that I specifically created to allow it. The only members of that group had to be allowed in through a vote of our little tech committee which consisted of me and various upper level admins.
It worked quite well and it was hilarious listening to the students removed that I had locked them out of one of the pranks they wanted to do.