email after job completes

My users told me that they receive an email whenever the job they run completes, I am looking at the script and can't figure out which line of code does that. I see it commented it out. Could somebody please take a look and let me know if I am missing anything?

#!/usr/bin/perl -w

 use Env;

 use Net::FTP;

 $PERL_SID = $ENV{'PERL_SID'};

 $PERL_PDL = $ENV{'PERL_PDL'};

 unless(defined($PERL_SID)){&F;exit(1);}

 $PATH = "/usr/local/bin:$ENV{'PATH'}";

 $SENDER = $ENV{'USER'};

 $FILE = "myfile.csv";

 #$MAILTO = "xxxystems\@mail.org";

 chdir("/$PERL_SID/law/$PERL_PDL/work/CSV") || &F;

 @Outbound = ("$FILE");

 if ($ftp = Net::FTP->new("variance.company.org", Timeout=>999)) {

     $ftp -> login("xxx", xxxxxxxx');

     $ftp -> binary;

     $ftp -> cwd("/pub/incoming");

     foreach $File (@Outbound) {

        if ( ! -e "$File" ) { &F ; next ; }

        $ftp -> put("$File") || ( &F ) ;

     }

     $ftp -> quit; }

 else { &F; }

 system("cp $FILE $FILE.bak")==0 || &F;

 system("cat $FILE.bak | /usr/local/rpci/bin/unix2dos | uuencode $FILE.bak $FILE.csv | mailx -m -s 'file sent File' $SENDER")==0 && un

 exit;

 sub F {

     my ($M1,$M2,$M3) = caller;

     open (MAIL, "|/usr/lib/sendmail $SENDER") || die;

     print MAIL "Subject: Transfer failure\n\n";

     print MAIL "\nTransfer Failed: \n";

     print MAIL "It appears that your myfile.csv transfer \n";

     print MAIL "has failed \n\n";

     print MAIL "Failure message was:\n";

     print MAIL "$M1 - $M2 - linenumber: $M3\n";

     close (MAIL);

 }