Problemas para enviar email

package extAulanet.utils;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class CSMTPAutenticacao extends Authenticator{
	private String userName;
	private String password;
	public CSMTPAutenticacao(String userName, String password) {
		this.userName = userName;
		this.password = password;
	}
	
	public PasswordAuthentication getPasswordAuthentication() {
	      return new PasswordAuthentication(userName, password);
	   }


}

package extAulanet.utils;

import java.util.Date;
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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


public class CEmail {
	private String smtp;
	private String username;
	private String password;
	private String from;
	private String to;
	private String assunto;
	private String corpoMsg;
	public CEmail(String host, String smtp, String from, String to, String corpoMsg, String assunto,
			String username, String password){
		this.smtp = smtp;
		this.username = username;
		this.password = password;
		this.from = from;
		this.to = to;
		this.assunto = assunto;
		this.corpoMsg = corpoMsg;
	}
	
	public void enviaEmail(){
		Properties p = new Properties();
		//p.put(host, smtp);
		p.put("mail.smtp.host",smtp);
		Authenticator auth = new CSMTPAutenticacao(username, password);
		Session session = Session.getInstance(p,auth);
		p.put("mail.smtp.auth", "false");
		
		MimeMessage msg = new MimeMessage(session);
		
		try{
			msg.setFrom(new InternetAddress(from));
			msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
			msg.setSentDate(new Date());
			msg.setSubject(assunto);
			msg.setText(corpoMsg.toString(), "text/html");
			Transport.send(msg);
			
		}catch(AddressException e){
			e.printStackTrace();
		}catch(MessagingException e){
			e.printStackTrace();
		}
	}
	
}