my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time);
$date = "$mday/$mon/$year $hour:$min:$sec"; # THIS IS WRONG!!!!

# do something like this instead:
my @time = localtime;
my $date = sprintf("%2d/%2d/%4d %02d:%02d:%02d", $time[4] + 1, $time[3], $time[5] + 1900, @time[2,1,0]);

##</code><code>##

while(my ($key, $value) = each(%forward)) {
    if ($to =~ $key) {
        $local_address = $key;
        $forward_address = $value;
    }
}

##</code><code>##

if( exists $forward{$to} ){
        $local_address = $key;
        $forward_address = $value;
}

##</code><code>##

    $sql = <<EOF;
SELECT "tblForwardMail"."ForwardMailID", "tblFilterMail"."FilterMailEmail"
            FROM "tblForwardMail"
            LEFT JOIN "tblFilterMail" ON "tblForwardMail"."ForwardMailID"="tblFilterMail"."ForwardMailID"
            WHERE "tblForwardMail"."ForwardMailTo"=?
EOF
#    $sth = $dbh->prepare($sql);
#    $sth->execute( $local_address );
#    while (@row = $sth->fetchrow) {
#        push(@filter, $row[1]);
#    }
#
# But it seems like what you want next is just:
(undef,$filter_address) = $dbh->selectrow_array($dbh,{},$local_address);
# make sure to pre-declare $filter_address

##</code><code>##

foreach my $email_address(@filter) {
    if (($from =~ $email_address)){
        $store = "YES";
    }
}

##</code><code>##

$store = "YES" if grep( $_ eq $from, @filter );

##</code><code>##

$store = "YES" if $from eq $filter_address;

##</code><code>##

  $store = 1;  # true
  $store = 0;  # false
  if( $store ){
    ...
  }
  if( ! $store ){
    ...
  }

##</code><code>##

#Declare variables to be used including command line variables if needed
my ($stored_email, $log, $to, $from, $forward_address, $store, $body, $sql, $sth, $date, $local_address);