Thanks for filing this bug in Ubuntu, and also in Debian. The mailman package in Ubuntu is a straight sync from the Debian one, so it's best to be fixed there first.
This might have something to do with debian/patches/91_utf8.patch. I see it doing some charset manipulation in the "install:" target, and this line looks suspiscious: + CHARSET_ru=koi8-r; \ ** Also affects: mailman (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901810 Importance: Unknown Status: Unknown ** Changed in: mailman (Ubuntu) Status: New => Triaged ** Changed in: mailman (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to mailman in Ubuntu. https://bugs.launchpad.net/bugs/1777349 Title: Broken encoding in Russian-translated HTML templates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mailman/+bug/1777349/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs