I believe this is fixed in mailman 1:2.1.12-1 which is now in Debian.
** Changed in: mailman (Ubuntu)
Status: New => Fix Committed-- duplicate Mime-Version header https://bugs.launchpad.net/bugs/320470 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
