{
    # vim: ft=perl ts=4 sw=4 et:
    # perltidy -pbp
    
    if ( ( $mxbackup{status} || "disabled" ) eq "enabled" ) {
        $OUT = "# Following is a list of systems or domains.\n";
        $OUT .= "# This system is configured to act as a MX Backup for\n";
        $OUT .= "# these systems (if there's only one line) or domains.\n";
        $OUT .= "# If there is a line beginning with a dot, then this\n";
        $OUT .= "# system will accept mails for any hosts of this domain\n";
        $OUT .= "# MX Backup start\n";

        my $MXFlag = 0;
        my %MXValues = split /,/, ( $mxbackup{name} || "" );
        foreach my $data (
            sort {
                ( join( "\.", reverse( split /\./, $a ) ) )
                    cmp( join( "\.", reverse( split /\./, $b ) ) )
            }
            keys %MXValues
            ) {
            $OUT .= "$data\n";
            $OUT .= ".$data\n" if ( $MXValues{$data} );
            $MXFlag = 1;
        }
        $OUT .= "### No MX Backup set Now ...\n" if ( !$MXFlag );
        $OUT .= "# MX Backup end\n";
    }
}