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did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA

I'm a little confused as to why I am seeing the following in my maillog. 
I'm seeing this on redhat rpm sendmail packages 8.11.6. I have my local 
net configured in access.db as RELAY. The message is being logged every 10 
minutes, which conincides with a small perl script I am running to check 
on whether certain ports are listening. Maybe my perl syntax is incorrect?
A quick google makes it sound like this is seen when the server itself is 
either blocking the conversation or the remote side is attaching and then 
just dropping the connection. Since I'm able to send other mail, it seems 
to really point to the script. Any ideas or suggestions on how to 
confirm/correct this?

Mail log entry:
Dec 16 09:30:01 name1 sendmail[3832]: NOQUEUE: test1.lunarhosting.lab 
[] did not issue MAIL/EXPN/VRFY/ETRN during connection to 

Perl Script:
#!/usr/bin/perl -w
use strict;
use IO::Socket;
use Sys::Hostname;
use Mail::Mailer;
use POSIX qw(strftime);

my %services = (
                 smtpd    => '25',
                 named    => '53',
                 httpd    => '80',

## set up values for socket
my $proto = 'tcp';
my $false = 0;
my $hostname = hostname();
my $host = gethostbyname("$hostname");
my $ip = inet_ntoa("$host");

for my $daemon(keys %services) {
  my $disco = '0';
  my $checkport = IO::Socket::INET->new(
    PeerAddr => "$ip",
    PeerPort => "$services{$daemon}",
    Proto    => "$proto",
    Timeout  => '0',
  ) or $disco = "1";

  if ($disco) {
  close $checkport if (!$disco);
sub notify {
  my $daemon = shift;
  my $to = 'foo@lunarmedia.lab';
  my $from = 'bar@lunarmedia.lab';
  my $subject = "$time - $hostname not listening on 
  my $mailer = Mail::Mailer->new();

                        To      => "$to",
                        Subject => "$subject",
                        From    => "$from",


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