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Java Mail腾讯企业邮箱或其他邮箱发送邮件失败bug记录

🕗 发布于 2024-10-12 15:34 java  bug  mail  邮箱  

问题出现情况

  邮件发送时debug用F8逐步运行可以成功发送邮件，但是用F9或者直接运行程序却发送失败
  未开启mail的debug模式的报错日志是下面这个：

org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: [EOF]
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:440)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:356)

  开启了mail的debug日志，然后之前忘了添加超时设置，后续添加了下面超时设置

spring:
  #JavaMailSender
  mail:
    host: smtp.exmail.qq.com
    port: 587
    username: xxx@xxx.com
    password: xxx
    default-encoding: UTF-8
    properties:
      mail.smtp.starttls.enable: true
      mail.smtp.timeout: 5000 # 设置连接超时（毫秒）后面加的
      mail.smtp.connectiontimeout: 5000 # 设置连接超时（毫秒）后面加的
      mail.smtp.writetimeout: 5000 # 设置写入超时（毫秒）后面加的

  之后发现是卡在了权限验证AUTH LOGIN，然后无法进行下一步，直到超时，日志如下：

DEBUG SMTP: exception reading response, THROW: 
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:475)
at sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:469)
at sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:69)
at sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1271)
at sun.security.ssl.SSLSocketImpl.access$300(SSLSocketImpl.java:76)
at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:948)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:126)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:106)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2440)
at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:1699)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:759)
at javax.mail.Service.connect(Service.java:366)
at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:518)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:437)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:356)
at com.example.demo.mail.MailServiceImpl.send(MailServiceImpl.java:95)
at com.example.demo.mail.MailServiceImpl.send(MailServiceImpl.java:108)
at com.example.demo.schedule.MyRunner.run(MyRunner.java:20)
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:781)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:765)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:319)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)

问题解决过程

  在debug过程中发现是在TLS握手时超时导致的权限验证失败，在项目启动时添加：

-Djavax.net.debug=ssl:handshake

  添加后查看日志，ServerHello返回的版本是TLSv1.2，但是指定通信的版本是TLSv1.3，成功的日志指定的也是1.3，我尝试配置指定TLS版本为v1.2后发现问题成功解决：

spring:
  mail:
    host: smtp.exmail.qq.com
    port: 587
    username: xxx@xxx.com
    password: xxx
    default-encoding: UTF-8
    properties:
      mail.smtp.starttls.enable: true
      mail.smtp.starttls.required: true
      mail.smtp.ssl.protocols: TLSv1.2
      mail.smtp.auth: true
      mail.smtp.timeout: 5000 # 设置连接超时（毫秒）
      mail.smtp.connectiontimeout: 5000 # 设置连接超时（毫秒）
      mail.smtp.writetimeout: 5000 # 设置写入超时（毫秒）

  后续我通过openssl命令行执行查看server的TLS版本发现是支持v1.3的：

admin@DESKTOP-0SP0F5T MINGW64 ~/Desktop
$ openssl s_client -starttls smtp -crlf -connect smtp.exmail.qq.com:587
Connecting to 119.147.6.199
CONNECTED(00000250)
depth=2 C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
verify return:1
depth=1 C=US, O=DigiCert Inc, CN=DigiCert Secure Site CN CA G3
verify return:1
depth=0 C=CN, ST=Guangdong Province, L=Shenzhen, O=Tencent Technology (Shenzhen) Company Limited, CN=*.exmail.qq.com
verify return:1
...省略
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 3871 bytes and written 446 bytes
Verification: OK
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
...省略
---
250 8BITMIME
---
Post-Handshake New Session Ticket arrived:
SSL-Session:
    Protocol  : TLSv1.3
    Cipher    : TLS_AES_256_GCM_SHA384
...省略

  然而通过ssl-tool在线验证却发现不支持，可自行点击超链接查看
  问了chatgpt发现也是：
在这里插入图片描述
  所以最后解决方法是指定了TLS版本

补充

  项目用的是JDK1.8，SpringBoot版本是2.1.8.RELEASE，后续使用了JDK17，SpringBoot版本3.3.4问题依旧，而且F8调试的不会报错，但是指定了TLS版本的方法虽然成功发送了邮件，但是socket已关闭然后报错。如下：

221 Bye
发送邮件完毕...
2024-10-12 14:04:16.696  INFO 30640 --- [       Thread-2] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'
javax.net.ssl|FINE|01|main|2024-10-12 14:04:16.690 GMT+08:00|SSLSocketImpl.java:497|duplex close of SSLSocket
javax.net.ssl|FINE|01|main|2024-10-12 14:04:16.692 GMT+08:00|SSLSocketImpl.java:1551|close the underlying socket
javax.net.ssl|FINE|01|main|2024-10-12 14:04:16.692 GMT+08:00|SSLSocketImpl.java:1570|close the SSL connection (initiative)
javax.net.ssl|FINE|01|main|2024-10-12 14:04:16.692 GMT+08:00|SSLSocketImpl.java:755|close inbound of SSLSocket
javax.net.ssl|WARNING|01|main|2024-10-12 14:04:16.693 GMT+08:00|SSLSocketImpl.java:515|SSLSocket duplex close failed (
"throwable" : {
  java.net.SocketException: Socket is closed
  at java.net.Socket.shutdownInput(Socket.java:1538)
  at com.sun.mail.util.WriteTimeoutSocket.shutdownInput(WriteTimeoutSocket.java:281)
  at sun.security.ssl.BaseSSLSocketImpl.shutdownInput(BaseSSLSocketImpl.java:218)
  at sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:771)
  at sun.security.ssl.SSLSocketImpl.bruteForceCloseInput(SSLSocketImpl.java:720)
  at sun.security.ssl.SSLSocketImpl.duplexCloseOutput(SSLSocketImpl.java:580)
  at sun.security.ssl.SSLSocketImpl.close(SSLSocketImpl.java:504)
  at com.sun.mail.smtp.SMTPTransport.closeConnection(SMTPTransport.java:1425)
  at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1418)
  at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:476)
  at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361)
  at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:356)
  at com.example.demo.mail.MailServiceImpl.send(MailServiceImpl.java:95)
  at com.example.demo.mail.MailServiceImpl.send(MailServiceImpl.java:105)
  at com.example.demo.schedule.MyRunner.run(MyRunner.java:20)
  at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:781)
  at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:765)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:319)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)

最后

  哪位大佬知道这是为什么吗，最终还是没明白问题出在了哪里，望指点


原文地址：https://blog.csdn.net/q1119823309/article/details/142873400

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