I've just started playing with Mailman on a virtual hosting solution. I decided to write about it in the 'developers' mailing lists because I am ready to make some changes to the code and publish them.
I know you're working on Mailman 3.x series but it's not ready yet (correct me if I'm wrong) and I would like to have a solution now.
First thing that surprised me is that Mailman doesn't support virtual hosting. The second one was that documentation claimes it does. Even the simplest test, creation of lists with same names under different domains shows 2.x vhost support is simply broken.
There are several modified versions of Mailman that claim to support vhosts. Mark Sapiro's version didn't work for me (most commands resulted in errors). It could have been broken by merging upstream code.
I tried to apply the 2.1.13 patch to Debian Squeeze's Mailman installation. And it sort of works. You can at least create the mailing lists now, which is good.
Postfix virtual alias generator doesn't work. Mails are usually sent with wrong list e-mail addresses (the translated ones, not the public ones), so it's rather broken. But sending and recieving mail works.
I would like to know if there's anyone else interested in getting Mailman 2.x to support a feature the documentation already claims to support.
Testing, links to resources, code, and help with getting it official is welcome.