My email class

package net.mcviral.dev.plugins.servermanager.util;

import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
//import javax.mail.internet.MimeMessage.RecipientType;

public class Email {

	private String smtpServer;
	  private String username;
	  private String password;
	  private String to;
	  private String subject;
	  private String body;

	  public Email withSMTPServer(String smtpServer)
	  {
	    this.smtpServer = smtpServer;
	    return this;
	  }

	  public Email withUsername(String username)
	  {
	    this.username = username;
	    return this;
	  }

	  public Email withPassword(String password)
	  {
	    this.password = password;
	    return this;
	  }

	  public Email withTo(String to)
	  {
	    this.to = to;
	    return this;
	  }

	  public Email withSubject(String subject)
	  {
	    this.subject = subject;
	    return this;
	  }

	  public Email withBody(String body)
	  {
	    this.body = body;
	    return this;
	  }

	  public void send()
	  {
	    new Thread(new Runnable()
	    {
	      public void run()
	      {
	    	try{
	        Properties props = new Properties();
	        props.put("mail.smtp.host", Email.this.smtpServer);
	        //props.put("mail.smtp.socketFactory.port", "465");
	        props.put("mail.smtp.socketFactory.port", "587");
	        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
	        props.put("mail.smtp.auth", "true");
	        //props.put("mail.smtp.port", "465");
	        props.put("mail.smtp.port", "587");
	        Session session = Session.getInstance(
	          props,
	          new Authenticator()
	          {
	            protected PasswordAuthentication getPasswordAuthentication()
	            {
	              return new PasswordAuthentication(Email.this.username, Email.this.password);
	            }
	          });

	          Message message = new MimeMessage(session);
	          message.setRecipients(MimeMessage.RecipientType.TO, InternetAddress.parse(Email.this.to));
	          message.setSubject(Email.this.subject);
	          message.setText(Email.this.body);
	          Transport.send(message);
	        }
	        catch (MessagingException e)
	        {
	          e.printStackTrace();
	        }catch(Exception e){
	        	e.printStackTrace();
	        }
	      }
	    }).start();
	  }

}