/usr/ is in php-horde-smtp 1.3.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/php-horde-smtp/
/usr/share/doc/php-horde-smtp/changelog.Debian.gz
/usr/share/doc/php-horde-smtp/UPGRADING
/usr/share/doc/php-horde-smtp/copyright
/usr/share/doc/php-horde-smtp/package.xml.gz
/usr/share/php/
/usr/share/php/tests/
/usr/share/php/tests/Horde_Smtp/
/usr/share/php/tests/Horde_Smtp/Horde/
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/FilterDataTest.php
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/phpunit.xml
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/bootstrap.php
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/Xoauth2Test.php
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/AllTests.php
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/RemoteServerTest.php
/usr/share/php/tests/Horde_Smtp/Horde/Smtp/conf.php.dist
/usr/share/php/data/
/usr/share/php/data/Horde_Smtp/
/usr/share/php/data/Horde_Smtp/locale/
/usr/share/php/data/Horde_Smtp/locale/Horde_Smtp.pot
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_smtp.reg
/usr/share/php/Horde/
/usr/share/php/Horde/Smtp.php
/usr/share/php/Horde/Smtp/
/usr/share/php/Horde/Smtp/Debug.php
/usr/share/php/Horde/Smtp/Password.php
/usr/share/php/Horde/Smtp/Filter/
/usr/share/php/Horde/Smtp/Filter/Data.php
/usr/share/php/Horde/Smtp/Exception.php
/usr/share/php/Horde/Smtp/Password/
/usr/share/php/Horde/Smtp/Password/Xoauth2.php
/usr/share/php/Horde/Smtp/Connection.php
/usr/share/php/Horde/Smtp/Translation.php