/usr/include/KPim/ is in libkpimsmtp-dev 17.12.2-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KPim/KSMTP/
/usr/include/KPim/KSMTP/KSMTP/
/usr/include/KPim/KSMTP/KSMTP/Job
/usr/include/KPim/KSMTP/KSMTP/LoginJob
/usr/include/KPim/KSMTP/KSMTP/SendJob
/usr/include/KPim/KSMTP/KSMTP/Session
/usr/include/KPim/KSMTP/KSMTP/SessionUiProxy
/usr/include/KPim/KSMTP/ksmtp/
/usr/include/KPim/KSMTP/ksmtp/job.h
/usr/include/KPim/KSMTP/ksmtp/ksmtp_export.h
/usr/include/KPim/KSMTP/ksmtp/loginjob.h
/usr/include/KPim/KSMTP/ksmtp/sendjob.h
/usr/include/KPim/KSMTP/ksmtp/session.h
/usr/include/KPim/KSMTP/ksmtp/sessionuiproxy.h
/usr/include/KPim/ksmtp_version.h