springboot项目在阿里云服务器上发送邮件失败,本地可以 原创

springboot项目在阿里云服务器上发送邮件失败,本地可以。。

报错信息

nested exception is:
	java.net.ConnectException: Connection timed out (Connection timed out). Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;
  nested exception is:
	java.net.ConnectException: Connection timed out (Connection timed out); message exception details (1) are:
Failed message 1:
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;
  nested exception is:
	java.net.ConnectException: Connection timed out (Connection timed out)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2118)
	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:345)
	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:340)
	at com.leixing.blog.service.impl.SendMailServiceImpl.sendMailCode(SendMailServiceImpl.java:42)
	at com.leixing.blog.service.impl.SendMailServiceImpl$$FastClassBySpringCGLIB$$41b7966c.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:736)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:84)

提取主要信息，是因为端口25没有开放，解决方法修改发送邮件的端口。

 com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;  

在配置文件(application.properties)中添加mail配置  

spring.mail.host=220.181.15.111
spring.mail.username=邮箱
spring.mail.password=权限密码
spring.mail.default-encoding=UTF-8
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true
spring.mail.port=465
spring.mail.properties.mail.smtp.socketFactory.port = 465
spring.mail.properties.mail.smtp.socketFactory.class = javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.socketFactory.fallback = false

解决参考：https://blog.csdn.net/weixin_39330443/article/details/81739287