【java】Java、Spring：邮件发送不成功，会是什么问题呢？

【java】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 = new JavaMailSenderImpl();
sender.setHost("smtp.qq.com");
sender.setPort(465);
sender.setUsername("********@qq.com");
sender.setPassword("********");
Properties pro = System.getProperties();
pro.put("mail.smtp.auth", "true");
pro.put("mail.smtp.timeout", "25000");
sender.setJavaMailProperties(pro);
MimeMessage message = sender.createMimeMessage();
try {
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom("********@qq.com"); // 发送人 
helper.setTo("********@126.com"); // 收件人  
helper.setSubject("Title"); // 标题
helper.setText("Content"); // 内容
sender.send(message);
System.out.println("发送完毕！");
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}

25秒超时后报错如下：

org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465. Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465; message exception details (1) are:
Failed message 1:
javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:899)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:158)
at javax.mail.Service.connect(Service.java:233)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:389)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:340)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:336)
at Demo.main(Demo.java:31)

有的邮箱密码不填邮箱密码，而是填分配的授权码，我用邮箱密码、授权码都不行...

--------------------已解决，完整代码如下，还有问题可以私信我-----------------

public class Demo {
public static void main(String[] args) {
JavaMailSenderImpl sender = new JavaMailSenderImpl();
sender.setHost("smtp.qq.com");
sender.setPort(465);
sender.setUsername("*********@qq.com");
sender.setPassword("xqbhcaptnzurzbhef"); // 这里要用邀请码，不是你登录邮箱的密码
Properties pro = System.getProperties(); // 下面各项缺一不可
pro.put("mail.smtp.auth", "true");
pro.put("mail.smtp.ssl.enable", "true");
pro.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
sender.setJavaMailProperties(pro);
MimeMessage message = sender.createMimeMessage();
try {
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom("*********@qq.com"); // 发送人 
helper.setTo("*********@126.com"); // 收件人  
helper.setSubject("Title"); // 标题
helper.setText("Content"); // 内容
sender.send(message);
System.out.println("发送完毕！");
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}

回答

无法连接。

使用 telnet 试试。

（PS：尽快修改QQ密码）

您好,项目部署在阿里云上,主题和发送人中文会出现乱码,您遇到过这个问题么

测试成功，引用的包有这些：
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

我使用的是腾讯企业邮箱，密码即邮箱密码。

还是抱错：org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Exception reading response;
nested exception is:

javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure. Failed messages: javax.mail.MessagingException: Exception reading response;

nested exception is:

javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure; message exception details (1) are:

Failed message 1:
javax.mail.MessagingException: Exception reading response;
nested exception is:

javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1462)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1260)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:389)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:340)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:336)
at com.phzc.pgs.biz.mail.SendTemplateMailTask.main(SendTemplateMailTask.java:50)

Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure

at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.recvAlert(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
at sun.security.ssl.AppInputStream.read(Unknown Source)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:97)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:75)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1440)
... 7 more

你好，我现在javamail代码发送邮件的时候报com.sun.mail.smtp.SMTPSendFailedException: 554 DT:SPM
这么一个东西，程序是运行完了，但是接收不到邮件，不知道什么原因，请指教。

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