If Outlook is available you may be better off using that.

This is a skeleton of something I've used. You'd need to adjust the mailbox name.

#!/usr/bin/perl

use v5.12.2;
use warnings;
use strict;

use Win32::OLE;

my $mail = parse_inbox();

sub parse_inbox{

  # use existing instance if Outlook is already running, or launce a n
+ew one

  my $ol;
  eval {$ol = Win32::OLE->GetActiveObject('Outlook.Application')};
  die "Outlook not installed" if $@;

  unless (defined $ol) {
    $ol = Win32::OLE->new('Outlook.Application', sub {$_[0]->Quit;})
      or die "Oops, cannot start Outlook";
  }
  
  my $mailbox = seekFolder(
    $ol->Session, 
    'Mailbox - John Sharpe'
  ); # adjust to suit

  my $folder  = seekFolder(
    $mailbox, 
    'Inbox'
  );
  
  my (%table);

  for (my $i = 1; $i <= $folder->Items->Count; $i++) {
    
    my $sender_name = $folder->Items->Item($i)->SenderName;
    my $subject     = $folder->Items->Item($i)->Subject;
    my $body        = $folder->Items->Item($i)->Body;
    
    say $subject;
    
    # process
    
    # store something in table
    
  }
  return \%table;
}

sub seekFolder {
  
  my $obj     = shift;
  my $target  = shift;
  
  for (my $i = 1; $i <= $obj->Folders->Count; $i++) {
    if ($obj->Folders->Item($i)->Name eq $target) {
      return $obj->Folders->Item($i);
    }
  }
  
  return;
  
}
[download]

Tested with Outlook 2003. There is a snag in that after the script is started Outlook complains that something is trying to look at the contact list. You need to click a checkbox and OK.