This file is indexed.

/usr/lib/courier/faxmail/coverpage is in courier-faxmail 0.66.1-1ubuntu4.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#! /bin/bash
#
# Copyright 2002 Double Precision, Inc.  See COPYING for
# distribution information.
#

. /usr/lib/courier/faxmail/init

/usr/bin/perl -e '
foreach ("FROM", "TO", "SUBJECT", "DATE")
{
    $ENV{$_} =~ s/\\/\\\\/g;
    $ENV{$_} =~ s/\s/ /g;
}
open(F, "/etc/courier/faxcoverpage.tr") || die "/etc/courier/coverpage.tr: $!\n";

$blank=1;

while (defined($_=<F>))
{
    next if /^#/;
    next if /^\n/ && $blank;
    $blank=0;
    s/%FROM%/$ENV{"FROM"}/ge;
    s/%TO%/$ENV{"TO"}/ge;
    s/%SUBJECT%/$ENV{"SUBJECT"}/ge;
    s/%DATE%/$ENV{"DATE"}/ge;
    s/%PAGES%/$ENV{"PAGES"}/ge;
    print;
}
close(F);

print ".nf\n";
while (defined($_=<STDIN>))
{
    chomp;
    s/\\/\\\\/g;
    s/^/\\\&/g;
    print "\\f(CW$_\\fP\n";
}
print ".fi"

' > $OUTDIR/.tr

$TBL <$OUTDIR/.tr >$OUTDIR/.tbl
rm -f $OUTDIR/.tr
$TROFF -mm <$OUTDIR/.tbl >$OUTDIR/.troff
rm -f $OUTDIR/.tbl
$DPOST <$OUTDIR/.troff >$OUTDIR/.dpost
rm -f $OUTDIR/.troff
$GS -sDEVICE=faxg3 $FAXRES -dBATCH -sOutputFile=$OUTDIR/f%04d -dNOPAUSE -q -dSAFER - <$OUTDIR/.dpost