infra-bugs@ is neither person nor project, and so it can't be maintainer per GLEP67. Furthermore, it doesn't accept non-bugzie mail AFAIK. I think you wanted to use the sysadmin herd there.
commit a170b9c6678a896bebcbf774f94881eda157fa85 Author: Michał Górny <mgorny@gentoo.org> Date: Wed Jan 6 13:52:02 2016 app-admin/fifo-cronolog: Remove infra-bugs@g.o from maints, #570164