When you need to debug a mail application, you can use the mail debugging feature. The mail component generates debugging information, on a per session basis, that can be used for problem determination or tuning.
ResourceMgrIm I WSVR0049I: Binding Test as mail/test SystemOut O *** In SessionReferenceable.getReference: SystemOut O added StringRefAddr: type=ws.transport.password, content=**** SystemOut O added StringRefAddr: type=ws.isolated.class.loader, content=false SystemOut O added StringRefAddr: type=mail.transport.protocol, content=smtp SystemOut O added StringRefAddr: type=mail.imaps.class, content=com.sun.mail.imap.IMAPSSLStore SystemOut O added StringRefAddr: type=mail.smtp.host, content=smtp.coldmail.com SystemOut O added StringRefAddr: type=mail.debug, content=true SystemOut O added StringRefAddr: type=mail.pop3s.class, content=com.sun.mail.pop3.POP3SSLStore SystemOut O added StringRefAddr: type=mail.from, content=smith@coldmail.com SystemOut O added StringRefAddr: type=mail.smtp.class, content=com.sun.mail.smtp.SMTPTransport SystemOut O added StringRefAddr: type=mail.smtps.class, content=com.sun.mail.smtp.SMTPSSLTransport SystemOut O added StringRefAddr: type=mail.imap.class, content=com.sun.mail.imap.IMAPStore SystemOut O added StringRefAddr: type=mail.smtp.user, content=smith SystemOut O added StringRefAddr: type=mail.pop3.class, content=com.sun.mail.pop3.POP3Store SystemOut O added StringRefAddr: type=mail.mime.address.strict, content=true SystemOut O DEBUG: JavaMail version 1.4ea SystemOut O DEBUG: java.io.FileNotFoundException: C:\Program Files\IBM\WebSphere\AppServer\java\jre\lib\javamail.providers (The system cannot find the file specified.) SystemOut O DEBUG: !anyLoaded SystemOut O DEBUG: not loading resource: /META-INF/javamail.providers SystemOut O DEBUG: successfully loaded resource: /META-INF/javamail.default.providers SystemOut O DEBUG: Tables of loaded providers SystemOut O DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider [TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider [TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider [STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider [STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider [STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider [STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]} SystemOut O DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems,Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems,Inc], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]} SystemOut O DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map SystemOut O DEBUG: !anyLoaded SystemOut O DEBUG: not loading resource: /META-INF/javamail.address.map SystemOut O DEBUG: java.io.FileNotFoundException: C:\Program Files\IBM\WebSphere\AppServer\java\jre\lib\javamail.address.map (The system cannot find the file specified.) SystemOut O *** In SessionFactory.setPasswordAuthentication, TRANSPORT PasswordAuthentication is based on: SystemOut O url=smtp://smith@smtp.coldmail.com SystemOut O user=smith SystemOut O password=**** SystemOut O *** In SessionFactory.getObjectInstance, session properties: SystemOut O mail.transport.protocol=smtp SystemOut O mail.imaps.class=com.sun.mail.imap.IMAPSSLStore SystemOut O mail.smtp.host=smtp.coldmail.com SystemOut O mail.debug=true SystemOut O mail.pop3s.class=com.sun.mail.pop3.POP3SSLStore SystemOut O mail.from=smith@coldmail.com SystemOut O mail.smtp.class=com.sun.mail.smtp.SMTPTransport SystemOut O mail.smtps.class=com.sun.mail.smtp.SMTPSSLTransport SystemOut O mail.imap.class=com.sun.mail.imap.IMAPStore SystemOut O mail.smtp.user=smith SystemOut O mail.pop3.class=com.sun.mail.pop3.POP3Store SystemOut O mail.mime.address.strict=true SystemOut O DEBUG: mail.smtp.class property exists and points to com.sun.mail.smtp.SMTPTransport SystemOut O DEBUG SMTP: useEhlo true, useAuth false SystemOut O DEBUG SMTP: trying to connect to host "smtp.coldmail.com", port 25, isSSL false javax.mail.MessagingException: Unknown SMTP host: smtp.coldmail.com; nested exception is: java.net.UnknownHostException: smtp.coldmail.com at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1280) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370) at javax.mail.Service.connect(Service.java:275) at javax.mail.Service.connect(Service.java:156) at javax.mail.Service.connect(Service.java:105) at javax.mail.Transport.send0(Transport.java:168) at javax.mail.Transport.send(Transport.java:98) at com.ibm.ws.mail.ut.TestServlet.doTask(TestServlet.java:104) at com.ibm.ws.mail.ut.TestServlet.doGet(TestServlet.java:65) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1397) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:759) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:429) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3512) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:273) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:896) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1530) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:161) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:272) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1487) Caused by: java.net.UnknownHostException: smtp.coldmail.com at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:196) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:519) at java.net.Socket.connect(Socket.java:469) at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232) at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250) ... 32 more
This output illustrates a connection failure to a Simple Mail Transfer Protocol (SMTP) server because a fictitious name, smtp.coldmail.com, is specified as the server name.