JavaMail SSL without authentication trust certificate, anyway

I have a local mail server (hMailServer) with SSL (port 465) and self signed certificate.

Domain is "foobar.com"

I have set Propertiesto enable ssl, disable authentication and trust any host

    props.put("mail.smtp.auth", "false");
    props.put("mail.smtp.ssl.enable", "true");
    props.put("mail.smtp.ssl.trust", "*");

If I send a message to via a static call Transport.send(), the email will be sent.

If I try to get the instance transportfrom the session then I get

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

How can static calls avoid SSLHandshakeException?

Here is my tester code:

public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put("mail.smtp.host", "127.0.0.1");
    props.put("mail.debug", "false");
    props.put("mail.smtp.port", "465");
    props.put("mail.smtp.timeout", "60000");
    props.put("mail.smtp.auth", "false");
    props.put("mail.smtp.sendpartial", "true");
    props.put("mail.smtp.ssl.enable", "true");
    props.put("mail.smtp.ssl.trust", "*");
    Session session = Session.getInstance(props);
    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress("[email protected]"));
    message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("[email protected]"));
    message.setSubject("Just a Test " + new Date());
    message.setText("Hello World");

    //Comment and uncomment to test   
    Transport.send(message, message.getAllRecipients());

    //Transport t = session.getTransport("smtps");
    //t.connect();
    //t.sendMessage(message, message.getAllRecipients());
    //t.close();
}

It's a local system hidden from the outside, so I'm not worried about a man-in-the-middle attack generating their own certificate to bypass the SSL handshake...