Comment 1 for bug 1456122

For Mailman 2.1, you'll have to be satisfied with making the archive private. There are no plans to change this in Mailman 2.1.x. Also, it seems that perhaps more than just hiding the poster's From: address might be required, what about signatures, addresses in message bodies, etc.?

For MM 3, I have added Hyperkitty to the affected projects.