SMTP from Java and Gmail

I'm working on a Java POP3 / SMTP client for sending/receiving emails using which will be integrated with a custom socket server.

The problem is that when I send the email from my PC, the emails don't get received by the recipient, because the destination email thinks it's spoofed.  

I figured that if I sent an email from GMail / SMTP, while authenticated, etc, that I would get the same result as if I logged into the GMail web interface... But, this is what the message looks like.

Return-Path: <verify@domain_dot_com>
Received: from Desktop (ip-yyy-zzz-xx.dhcp.ispdomain.com [ip.yyy.zzz.xx])
        by mx.google.com with ESMTPS id 21sm74440iwn.11.2010.02.18.13.05.13
        (version=SSLv3 cipher=RC4-MD5);
        Thu, 18 Feb 2010 13:05:14 -0800 (PST)
Date: Thu, 18 Feb 2010 16:05:05 -0500 (EST)
From: verify@domain_dot_com
To: target@target_dot_net
Message-ID: <16627215.0.166211352034541.JavaMail.UserName@Desktop>
Subject: Device Verified
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

message body


Here's a section of the code: (See snippet)

sendEmail(String from,String to, String subject, String body) throws MessagingException {
       
            String host = "smtp.gmail.com";
        
            Properties props = new Properties();
            
            props.put("mail.smtps.auth", "true");
            props.put("mail.smtp.host", host);
            props.put("mail.smtp.port", "465");
            
            Session sendSession = Session.getInstance(props);
            sendSession.setDebug(true);
            MimeMessage msg = new MimeMessage(session);
            msg.setFrom(new InternetAddress(from));
            
            InternetAddress[] address = {new InternetAddress(to)};
            msg.setRecipients(Message.RecipientType.TO, address);
            msg.setSubject(subject);
            msg.setSentDate(new Date());

//          // Set message content
            msg.setText(body);
            
            Transport t = sendSession.getTransport("smtps");
            try {
                t.connect(host, username, password);
                t.sendMessage(msg, msg.getAllRecipients());
            } finally {
                t.close();
            }
        
            System.out.println("Email Sent.");
     
    }