/usr/share/aide/config/aide/aide.conf.d/31_aide_postgrey is in aide-common 0.16~a2.git20130520-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | /var/lib/postgrey$ VarDir
/var/lib/postgrey/postgrey(|lock)\.db$ VarFile
/var/lib/postgrey/log\.[0-9]{10}$ VarFile
/var/lib/postgrey/__db\.[0-9]{3}$ VarFile
|