javaMail learning (5) - use javaMail to send simple emails to QQ mailbox accounts

The code is similar to the one in Netease's mailbox, except that the smtp server address is different, and the code for "enable SSL encryption" needs to be added.

package com.wjl.mail.utils;

import java.security.GeneralSecurityException;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
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 com.sun.mail.util.MailSSLSocketFactory;

/**
 * Tools for sending emails
 * QQ mailboxes send messages to each other
*/
public class MailUtils {
	private static String userName = "XXXX";//QQ mailbox account for sending emails
	private static String password = "XXXX";//Authorization code
	private static String userName2 = "XXXXX";//QQ mailbox account for receiving mail
	private static String port = "465";//465、587
	/**
	 * This method is used to send mail
	 * @param to: who to email
	 * **/
	public static void sendMain(String to) throws AddressException, MessagingException, GeneralSecurityException{
		//1. Create a connection object and connect to the mailbox server
		Properties props = new Properties();
		//Enable debug debugging  
		props.setProperty("mail.debug", "true");  
		//The stmp server needs to perform authentication, that is, the verification of the username and password, so as to pass the verification
		props.setProperty("mail.smtp.auth", "true");
		// send mail protocol name  
		props.setProperty("mail.transport.protocol", "smtp");  
		//Set the mail server hostname  
		props.setProperty("mail.host", "smtp.qq.com");//Set as the outgoing server of qq: (do not use smtp.exmail.qq.com)
		//Set the port number (this configuration can be written or not)
		props.setProperty("mail.smtp.port", port);
		//Authorization code
		props.setProperty("mail.smtp.password",password);        
		 
		//Enable SSL encryption, otherwise it will fail
		MailSSLSocketFactory sf = new MailSSLSocketFactory();
		sf.setTrustAllHosts(true);
		props.put("mail.smtp.ssl.enable", "true");
		props.put("mail.smtp.ssl.socketFactory", sf);
		
		//Authenticator: Authentication information
		Session session = Session.getInstance(props, new Authenticator(){
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication(userName,password);//Use it to send emails to other accounts
			}
		});
		
		//2, create the mail object
		Message message = new MimeMessage(session);
		//2.1 Set the sender
		message.setFrom(new InternetAddress(userName));
		//2, 2 set the recipient
		message.setRecipient(RecipientType.TO, new InternetAddress(to));
		//2.3 Subject of the email
		message.setSubject("Test message");
		//2.4 The body of the email (ie the content of the email)
		message.setContent("Test mail:javaMail-QQ mailbox test","text/html;charset=utf-8");
		
		//3. Send email
		Transport trans = session.getTransport();
		//connect to mail server
		trans.connect(userName, password);  
		//send email
		trans.sendMessage(message, message.getAllRecipients());  
		//close the connection
		trans.close();
		
		//Transport.send(message); (both ways are possible)
		System.out.println("Successfully sent");
	}
	
	public static void main(String[] args) {
		try {
			sendMain(userName2);
		} catch (Exception e) {
			e.printStackTrace ();
		}
	}
}

Code to enable SSL encryption:

//Enable SSL encryption, otherwise it will fail
MailSSLSocketFactory sf = new MailSSLSocketFactory();
sf.setTrustAllHosts(true);
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.ssl.socketFactory", sf);

 

Add a QQ email account to FoxMail to view emails:

Attention :

1. The mailbox must open SMTP, obtain the authorization code (how to obtain it? Click me ), and use the latest authorization code to send emails.

2. The code to enable SSL encryption must be added, otherwise an error will be reported.

3. When adding a QQ mailbox account in Foxmail, an authorization code (not a QQ mailbox password) must be used, and "SSL" must be checked, otherwise the account will fail to be added.

 

There are too many problems encountered in the process of getting QQ mailbox, the next article will write about the problem, so I won't talk about it here.