/usr/share/GConf/gsettings/org.gnome.seahorse.recipients.convert is in seahorse-daemon 3.12.2-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | [org.gnome.seahorse.recipients]
sort-by = /apps/seahorse/listing/sort_by
|