<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

  mail:
    host: smtp.163.com # 发件服务器地址,不同邮件平台地址不同
    port: 25 #常用邮件端口25、109、110、143、465、995、993、994 如果开启了SSL安全则使用对应的端口号，25为非加密端口号
    username: xxx@163.com #发送邮件的账号
    password: xxxx#发送邮件账号的授权码,这里的授权码不是验证码.需要到邮箱
    default-encoding: utf-8 #设置编码
    properties: # 设置邮件超时时间防止服务器阻塞
      timeout: 5000
      connection-timeout: 5000
      write-timeout: 5000

package com.example.rabbitmq_demo.email;
 
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Service;
 
/**
 * @author: Zeke
 * @create: 2023-07-19 10:11
 **/
@Service
@Slf4j
public class Mail163impl implements Mail{
 
    @Autowired
    private JavaMailSender mailSender;
 
    @Value("${spring.mail.username}")
    String sendUserName;
 
    String[] emails = { "你要发送的邮箱1"，"你要发送的邮箱2" }; //多发
 
    spring email="你要发送的邮箱1";  //单发
 
    
 
    public Boolean sendEMail(String Subject) {
        try {
            SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
            simpleMailMessage.setFrom(sendUserName); //设置发送邮件账号
            simpleMailMessage.setTo(emails); //设置接收邮件的人，可以多个
            simpleMailMessage.setSubject("eMailCmd"); //设置发送邮件的主题
            simpleMailMessage.setText(Subject); //设置发送邮件的内容
            mailSender.send(simpleMailMessage);
            return true;
        } catch (MailException e) {
            log.error("邮件发送失败!");
            return false;
        }
    }
}

  @Autowired
    Mail mail;
 
 
 
    @Test
    void contextLoads() {
 
        Boolean aBoolean = mail.sendEMail("521");
        System.out.println(aBoolean);
 
    }