/usr/share/lintian/overrides/courier-authlib-postgresql is in courier-authlib-postgresql 0.66.1-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | courier-authlib-postgresql: non-standard-file-perm etc/courier/authpgsqlrc 0660 != 0644
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