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spring.mail.host=smtpdm.aliyun.com
spring.mail.port=465
spring.mail.username=username
spring.mail.password=password
spring.mail.properties.smtp.auth=true
spring.mail.properties.smtp.starttls.enable=true

MailUtil.java：

   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.mail.MailException;
   import org.springframework.mail.SimpleMailMessage;
   import org.springframework.mail.javamail.JavaMailSender;
   import org.springframework.stereotype.Component;
   import org.thymeleaf.TemplateEngine;
   @Component
   public class MailUtil {
       private final Logger logger = LoggerFactory.getLogger(getClass());
       @Autowired
       JavaMailSender mailSender;
       @Autowired
       TemplateEngine templateEngine;
       public void sendSimpleEmail(String deliver, String[] receiver, String[] carbonCopy, String subject, String content) throws ServiceException {
           long startTimestamp = System.currentTimeMillis();
           logger.info("Start send mail ... ");
           try {
               SimpleMailMessage message = new SimpleMailMessage();
               message.setFrom(deliver);
               message.setTo(receiver);
               message.setCc(carbonCopy);
               message.setSubject(subject);
               message.setText(content);
               mailSender.send(message);
               logger.info("Send mail success, cost {} million seconds", System.currentTimeMillis() - startTimestamp);
           } catch (MailException e) {
               logger.error("Send mail failed, error message is : {} \n", e.getMessage());
               e.printStackTrace();
               throw new ServiceException(e.getMessage());
 但是邮件发送一直失败，异常信息如下： 
org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtpdm.aliyun.com, port: 465, response: -1. Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtpdm.aliyun.com, port: 465, response: -1; message exception details (1) are:
Failed message 1:
javax.mail.MessagingException: Could not connect to SMTP host: smtpdm.aliyun.com, port: 465, response: -1
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2106)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:712)
    at javax.mail.Service.connect(Service.java:366)
    at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:501)
    at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:421)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:307)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:296)
    at cn.com.hellowood.mail.util.MailUtil.sendSimpleEmail(MailUtil.java:76)
    at cn.com.hellowood.mail.MailUtilTests.sendSimpleEmail(MailUtilTests.java:48)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runners.Suite.runChild(Suite.java:128)
    at org.junit.runners.Suite.runChild(Suite.java:27)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
 将端口改为80或25时可以正常发送，没有任何问题，所以问题在于使用465端口时 SSL 的配置出错了，添加了以下配置后问题解决： 
spring.mail.properties.mail.smtp.ssl.enable=true
                                    文章目录邮件常见异常：javax.mail.MessagingException: Could not connect to SMTP host1、异常触发2、Failed message 1: javax.mail.MessagingException: Could not connect to SMTP host: smtpdm.aliyun.com, port: 465, response:...
                                    javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465, response: -1
感觉其他都正确的话，如果自己电脑是winodws系统，查看一下hosts文件，因为可能里面多了一行 127.0.0.0 smtp.qq.com，
把它删除了，
                                    465的端口好像被占用了,改用了587,我使用的是QQ邮箱,可以参考邮箱给出的文档。sslEnable = false <-设置为false。服务配置出错了,参考上述截图修改一下mail的配置。在mail.setting中的设置。#使用SSL安全连接。
                                    这几天有在修改一个邮件发送的功能，使用的是javamail，然后本地测试ok，在腾讯的tsf环境上，报下面这个错：
javax.mail.MessagingException: Unknown SMTP host: smtp.163.com
DEBUG SMTP: trying to connect to host " smtp.163.com", port 465, isSSL true
                                    错误信息:
javax.mail.MessagingException: [EOF]
        at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1481)
        at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport
最近准备将一个项目发布到阿里云，在本地所有的功能都能够实现的很好，但是一到阿里云
错误报告内容：Could not connect to SMTP host: smtp.163.com, port: 25
翻译起来就是：不能连接到smtp.163.com，因为25号端口的原因。
也就是说，可以修改为：
public static void main(String[] args) throws Exception {
        Properties prop = new..
                                    今天写了一个邮件测试的代码想放到阿里云服务器上面，然后就把写好的代码导出jar包到Linux服务器上面运行，然后惊奇的发现无法发送邮件，然后经过一番搜索发现是阿里云把25端口封禁了，按照网友的指示我去申请解封，结果。。。
然后我决定曲线就国家，改用QQ邮箱的465端口，代码大概是这样
package test;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;
public class Se
                                    javax.mail.MessagingException: Exception reading response
Java、Spring：邮件发送不成功，会是什么问题呢？
QQ邮箱的相关服务均已开启:
代码如下：
public class Demo {
public static void main(String[] args) {
JavaMailSenderImpl sender = n...
                                    　　1.问题描述：关于使用Java Mail进行邮件发送，抛出Could not connect to SMTP host: xx@xxx.com, port: 25的异常可能：
　　当我们使用Java Mail进行邮件发送的时候，有时候会抛出Could not connect to SMTP host: xx@xxx.com, port: 25的异常。
　　一般的，处理该异常的做法都是去...
                                    关于使用Java Mail进行邮件发送，抛出Could not connect to SMTP host: xx@xxx.com, port: 25的异常可能
当时找了好久没发现问题，服务器一直报异常。
javax.mail.MessagingException: Could not connect to SMTP host: smtp.ym.163.com, port: 25;
  nes...