TextSender

import java.util.Properties;

import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class TextSender {

    private final Carrier carrier;
    private final Properties mail;
    private final Session session;

    public TextSender(final String email, final String password, final Carrier carrier) {
        this.carrier = carrier;

        this.mail = new Properties();
        this.mail.put("mail.smtp.auth", "true");
        this.mail.put("mail.smtp.starttls.enable", "true");
        this.mail.put("mail.smtp.host", "smtp.gmail.com");
        this.mail.put("mail.smtp.port", "587");

        this.session = Session.getInstance(mail, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(email, password);
            }
        });
    }

    public void send(String phoneNumber, String textMessage) throws Exception {
        Message message = new MimeMessage(session);
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(phoneNumber + carrier.getCarrier()));

        message.setText(textMessage);

        Transport.send(message);
    }

    public enum Carrier {
        ATT("@txt.att.net"), SPRINT("@messaging.sprintpcs.com"), TMOBILE("@tmomail.net"),
        VERIZON("@vtext.com"), VIRGIN("@vmobl.com");

        private String carrier;

        private Carrier(String carrier) {
            this.carrier = carrier;
        }

        public String getCarrier() {
            return carrier;
        }

    }
}