邮箱配置发送失败

我这里有两套环境，一套测试，一套正式环境

在测试环境上面可以配置成功也可以成功发送测试邮件，正式环境上会出这个报错，不知道是网络原因还是防火墙原因。

不用列文档了，该查的文档我都查过了

企业微信邮箱，报错如下：

com.sun.mail.util.MailConnectException: Couldn't connect to host, port: SMTP.exmail.qq.com, 25; timeout 60000;

nested exception is:

java.net.UnknownHostException: SMTP.exmail.qq.com

at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)

at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)

at javax.mail.Service.connect(Service.java:366)

at javax.mail.Service.connect(Service.java:246)

at com.fr.base.EmailManager.connect(EmailManager.java:686)

at com.fr.base.EmailManager.sendEmail(EmailManager.java:465)

at com.fr.base.EmailManager.send(EmailManager.java:422)

at com.fr.base.EmailManager.sendWithRecord(EmailManager.java:395)

at com.fr.base.EmailManager.send(EmailManager.java:358)

at com.fr.base.EmailManager.send(EmailManager.java:339)

at com.fr.base.EmailManager.send(EmailManager.java:320)

at com.fr.base.EmailManager.send(EmailManager.java:288)

at com.fr.base.EmailManager.sendTestMail(EmailManager.java:265)

at com.fr.decision.webservice.v10.config.ConfigService.testEmailConnection(Unknown Source)

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 com.fr.decision.config.ConfigInterceptor.intercept(Unknown Source)

at com.fr.decision.webservice.v10.config.ConfigService$$EnhancerByCGLIB$$fb9e39a3.testEmailConnection(

at com.fr.web.controller.decision.api.config.EmailResource.testEmail(Unknown Source)

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 com.fr.third.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)

at com.fr.third.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)

at com.fr.third.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)

at com.fr.third.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:854)

at com.fr.third.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:765)

at com.fr.third.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)

at com.fr.third.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)

at com.fr.third.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)

at com.fr.third.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)

at com.fr.third.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)

at com.fr.third.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)