This file is indexed.

preinst is in rmail 8.14.4-4.1ubuntu1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh
set -e

PACKAGE=rmail;

if [ -L /usr/share/doc/$PACKAGE ]; then
	# /usr/share/doc/$PACKAGE was a symlink to /usr/share/doc/sendmail
	rm /usr/share/doc/$PACKAGE
fi
if [ -L /usr/share/bug/$PACKAGE ]; then
	rm /usr/share/bug/$PACKAGE
fi