This seems an issue that should be filed upstream[1], I don't think a fix would really belong to the Ubuntu packaging.
[1] https://bugs.exim.org/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953876 Title: Can not specify different DNSBLs for IPv4/IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/953876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
