/usr/lib/GNUstep/ApplicationSupport/GNUMail/Fonts.prefs/Resources is in gnumail.app 1.2.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/GNUstep/ApplicationSupport/GNUMail/Fonts.prefs/../../../../../share/GNUstep/ApplicationSupport/GNUMail/Fonts.prefs