Enviar e-mail

System.clearProperty("trustStore");

        System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");
        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        System.setProperty("javax.net.ssl.keyStoreType", "PKCS12");
        System.setProperty("javax.net.ssl.keyStore", System.getProperty("user.dir") + "/certificados/" + nomeCertificado);
        System.setProperty("javax.net.ssl.keyStorePassword", Criptografia.decrypt(SingleParametros.getInstance().getParSenhaCert()));

package controle;

import java.util.List;

import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class EnviarEMail {

    private String remetente = "remetendo do email";
    private String passEMail = "senha";

    public EnviarEMail() {
    }

    public boolean enviarEMail(String nomeArquivo, String textoEmail, List<String> listaEMail, String nomeRemet) throws Exception {
        boolean resultado;
        String localXML;
        String mailBody;
        String mailSubject;
        boolean isHTML;
        String destinatario;
        String destinatarioName;
        String smtpServer;
        MimeBodyPart attachFilePart;
        FileDataSource fds;
        MimeBodyPart textPart;
        Properties mailProps;
        Session mailSession;
        Message msg;
        Multipart mp;

        localXML = System.getProperty("user.dir") + "/temp/";
        isHTML = true;
        mailBody = "Teste 1";
        mailSubject = "Teste 123";

        destinatarioName = "";
        smtpServer = SingleParametros.getInstance().getParSMTP();
        mailBody = textoEmail;
        attachFilePart = new MimeBodyPart();
        fds = new FileDataSource(localXML + nomeArquivo + ".xml");
        attachFilePart.setDataHandler(new DataHandler(fds));
        attachFilePart.setFileName(fds.getName());
        textPart = new MimeBodyPart();
        if (isHTML == true) {
            textPart.setContent(mailBody, "text/html");
        } else {
            textPart.setContent(mailBody, "text/plain");
        }

        try {

            SimpleAuth auth = new SimpleAuth(remetente, passEMail);

            for (String email : listaEMail) {
                destinatario = email;
                mailProps = new Properties();

                mailProps.setProperty("mail.transport.protocol", "smtp");
                mailProps.setProperty("mail.host", smtpServer);
                mailProps.setProperty("mail.user", remetente);
                mailProps.setProperty("mail.password", passEMail);
                mailProps.setProperty("mail.smtp.starttls.enable","true");
                mailProps.setProperty("mail.smtp.auth", "true");
                mailProps.setProperty("mail.smtp.user", remetente);

                mailSession = Session.getDefaultInstance(mailProps, auth);

                msg = new MimeMessage(mailSession);
                msg.setFrom(new InternetAddress(remetente, nomeRemet));
                msg.setRecipient(Message.RecipientType.TO, new InternetAddress(destinatario, destinatarioName));
                msg.setSubject(mailSubject);

                mp = new MimeMultipart();
                mp.addBodyPart(textPart);
                mp.addBodyPart(attachFilePart);
                msg.setContent(mp);

                Transport.send(msg);

            }
            resultado = true;

        } catch (Exception e) {
            System.err.println(e);
            e.printStackTrace();


            resultado = false;
        }
        //auth = null;
        localXML = null;
        mailBody = null;
        mailSubject = null;
        isHTML = false;
        //remetente = null;
        destinatario = null;
        destinatarioName = null;
        smtpServer = null;
        //passEMail = null;
        attachFilePart = null;
        fds = null;
        textPart = null;
        mailProps = null;
        mailSession = null;
        msg = null;
        mp = null;
        return resultado;

    }

}


class SimpleAuth extends Authenticator {

    public String username = null;
    public String password = null;

    public SimpleAuth(String user, String pwd) {
        username = user;
        password = pwd;
    }

    @Override
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
}