Comment 14 for bug 334064

So, while I'm still against any kind of reply-to munging, I'll say the following for the benefit of anybody who wants to hack on this.

The essential handling of the Reply-To header is in Mailman, so the easiest route to take would be to expose the 3 or so options that Mailman has to control this in the Launchpad web interface. That would actually not be that hard to do, but it would mean that munging is at the granularity of the mailing list. Mailman 2 does not and will not support per-user reply-to munging.

Note that the reason reply-to munging is in Mailman at all is to appease the vocal community who really want this. Oh and to support the very limited set of legitimate (IMHO) use cases.

If you want per-user reply-to munging your task is harder. Launchpad uses stock upstream Mailman, with a set of monkeypatches to communicate with Launchpad over XMLRPC. Your challenge then would be to implement the per-user reply-to munging policy in a monkeypatch, and then expose that in a natural way in the Launchpad user interface, probably on ~person/+editemails. I think this will be tricky.

Eventually, Launchpad will be integrated with Mailman 3, and if you really want per-user reply-to munging, that's where your efforts should go. If you decide to help with this, please engage with <email address hidden>. It's a controversial topic, well mined in the Mailman community, so our guidance over there is your best bet for success. I won't say it's /likely/ to make it in, but I won't completely discount the possibility here.

Hope that helps!