smtp 로컬에서는 되는데 운영에서만 안되네요..

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안녕하세요 선배님!현재 운영 중인 홈페이지에 smtp가 잘되다가, 비번이 바뀌는 바람에 연결이 끊겼습니다.비밀번호만 수정해 주고 배포해서 재기동하니, 그때부터 이런 오류가 계속 뜨네요.원래는 gmail을 사용하고 있었지만, 네이버로 변경까지 해봤습니다.계속 unknown 상태가 뜨는 상황인데 로컬의 경우에는 정상,운영에서만 저런 오류가 뜨니 미쳐돌겠습니다..선배님! 도와주십쇼 ㅠㅠ[오류내용]DEBUG: JavaMail version 1.5.5DEBUG: successfully loaded resource: /META-INF/javamail.default.providersDEBUG: Tables of loaded providersDEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport&#61;javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport&#61;javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore&#61;javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore&#61;javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore&#61;javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store&#61;javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}DEBUG: Providers Listed By Protocol: {imaps&#61;javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap&#61;javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps&#61;javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3&#61;javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s&#61;javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp&#61;javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}DEBUG: successfully loaded resource: /META-INF/javamail.default.address.mapDEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]DEBUG SMTP: useEhlo true, useAuth trueDEBUG SMTP: useEhlo true, useAuth trueDEBUG SMTP: trying to connect to host &#34;smtp.naver.com&#34;, port 465, isSSL truejavax.mail.MessagingException: Unknown SMTP host: smtp.naver.com; nested exception is: java.net.UnknownHostException: smtp.naver.com at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1959) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654) at javax.mail.Service.connect(Service.java:388) at javax.mail.Service.connect(Service.java:246) at javax.mail.Service.connect(Service.java:195) at javax.mail.Transport.send0(Transport.java:254) at javax.mail.Transport.send(Transport.java:124) at com.loopmotionstudio.front.service.FrontContactService.save(FrontContactService.java:221) at com.loopmotionstudio.front.controller.FrontContactController.save(FrontContactController.java:39) 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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) at javax.servlet.http.HttpServlet.service(HttpServlet.java:682) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:765) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:698) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:367) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:639) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:885) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1688) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:750)Caused by: java.net.UnknownHostException: smtp.naver.com at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:196) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) at java.net.Socket.connect(Socket.java:606) at java.net.Socket.connect(Socket.java:555) at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:321) at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:237) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927) ... 51 more실패2javax.mail.MessagingException: Unknown SMTP host: smtp.naver.com; nested exception is: java.net.UnknownHostException: smtp.naver.com실패 이유 : Unknown SMTP host: smtp.naver.com[smtp 설정] props.setProperty(&#34;mail.smtp.ssl.protocols&#34;, &#34;TLSv1.2&#34;); props.setProperty(&#34;mail.transport.protocol&#34;, &#34;smtp&#34;); props.setProperty(&#34;mail.smtp.auth&#34;, &#34;true&#34;); props.setProperty(&#34;mail.smtp.starttls.enable&#34;, &#34;true&#34;); props.setProperty(&#34;mail.debug&#34;, &#34;true&#34;); props.setProperty(&#34;mail.smtp.ssl.trust&#34;,&#34;smtp.naver.com&#34;); props.setProperty(&#34;mail.smtp.ssl.enable&#34;,&#34;true&#34;); props.put(&#34;mail.smtp.starttls.enable&#34;, &#34;true&#34;); props.put(&#34;mail.smtp.encodefilename&#34;, &#34;true&#34;); props.put(&#34;mail.smtp.charset&#34;, &#34;UTF-8&#34;); props.put(&#34;mail.smtp.host&#34;, SMTPSERVER); props.put(&#34;mail.smtp.port&#34;, 465);

allinux · Answer

╭─allinux@allinux-linux ~ ╰─$ nslookup smtp.naver.com Server: 127.0.0.53 Address: 127.0.0.53#53 Non-authoritative answer: Name: smtp.naver.com Address: 125.209.238.155위와 같이 서버에서 nslookup 해서 결과를 받는지 조회해보세요.조회를 못할 가능성이 큰데...조회를 못해온다면 smtp 주소 넣는 부분에 ip(125.209.238.155)로 변경하세요.

kenu,전독시 · Answer

네이버는 포트가 465가 아니고 587이라고 하네요.https://ktko.tistory.com/entry/JAVA-SMTP와-Mail-발송하기Google-Naver

smtp 로컬에서는 되는데 운영에서만 안되네요..

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