Simple Java example for sending e-mails

SendEmail.java

import javax.mail.Authenticator;
import javax.mail.Message;
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;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Properties;

public class SendEmail {

    private static final String NAME = "sender name";
    private static final String USERNAME = "sender username";
    private static final String PASSWORD = "sender password";
    private static final String HOST = "host";
    private static final String PORT = "port";

    @Override
    public void send(List<String> emails, String subject, String text) throws Exception {
        Properties properties = System.getProperties();

        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", HOST);
        properties.put("mail.smtp.port", PORT);

        Session session = Session.getInstance(properties, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(USERNAME, PASSWORD);
            }
        });

        try {
            MimeMessage message = new MimeMessage(session);

            InternetAddress[] addresses = emails.stream()
                    .map(this::createInternetAddress)
                    .toArray(InternetAddress[]::new);

            message.setFrom(new InternetAddress(USERNAME, NAME, StandardCharsets.UTF_8.name()));
            message.addRecipients(Message.RecipientType.TO, addresses);

            message.setSubject(subject);
            message.setText(text);

            Transport.send(message);
        } catch (Exception ex) {
            throw ex;
        }
    }

    private InternetAddress createInternetAddress(String address) {
        try {
            return new InternetAddress(address);
        } catch (AddressException e) {
            throw new RuntimeException();
        }
    }