Sending emails from the website

Mail tool class: (the case is Netease 163 mailbox)

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;
import javax.mail.internet.MimeMessage.RecipientType;

public class MailUtils {

   public static void sendMail(String email, String emailMsg)
           throws AddressException, MessagingException {
       // 1.创建一个程序与邮件服务器会话对象 Session

       Properties props = new Properties();
       props.setProperty("mail.transport.protocol", "SMTP");
       props.setProperty("mail.host", "smtp.163.com"); //The mailbox is different, the format is different
       props.setProperty("mail. smtp.auth", "true");// Specify the authentication as true

       // Create an authenticator
       Authenticator auth = new Authenticator() {
           public PasswordAuthentication getPasswordAuthentication() {
               return new PasswordAuthentication("leis17", "a123456");// Account authorization code (authorization code should be set in Netease mailbox)
           }
       };

       Session session = Session.getInstance(props, auth);

       // 2. Create a Message, which is equivalent to the content of the email
       Message message = new MimeMessage(session);

       message.setFrom(new InternetAddress("[email protected]")); // set sender

       message.setRecipient(RecipientType.TO, new InternetAddress(email)); // Set the sending method and recipient

       message.setSubject("User activation");
       // message.setText("This is an activation email, please <a href='#'>Click</a>");

       message.setContent(emailMsg, "text/html;charset=utf-8");

       // 3. Create a Transport for sending mail

       Transport.send(message) ;
   }

}

jsp page

</div>

</form>

Servlet

public class register1Servlet extends HttpServlet {

   public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       HttpSession session = request.getSession();
       String remail = request.getParameter("email"); //Get the input email address
       session .setAttribute("email", remail);
       // System.out.println("phone:"+request.getParameter("telephone"));
       String emailCode = null;// 6-digit verification code
       emailCode = "122222";
       RequestDispatcher dispatcher = request.getRequestDispatcher("/getCode.jsp");// Because it is under the same web application, there is no need to write /WEB_request/servlet2
       // The method of executing forwarding
       try {
           MailUtils.sendMail(remail, emailCode);//Send the message to the specified mailbox
       } catch (AddressException e) {
           e.printStackTrace();
       } catch (MessagingException e) {
           e.printStackTrace();
       }
       dispatcher.forward(request, response);
   }

   public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       doGet(request, response);
   }

}

Error report and its solution:

163 mailbox open pop3/smtp and other protocols, and then use the authorization code instead of the password to simulate the login, and the sending can be successful!

Sending emails from the website

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