Unknown SMTP host exception in java mail.

[Vikas Taank]

I am using the following properties to send the mail using java mail API.

props.put("mail.smtp.host", "smtp.studentjobexchange.com");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.port","587");
props.put("mail.smtp.auth", "true");
props.put("mail.debug", "true");

my domian is studentjobexchange.com.

while sending mail from this domain, I am getting the following exception:



DEBUG: not loading file: /usr/java/jre1.6.0_06/lib/javamail.providers
DEBUG: java.io.FileNotFoundException: /usr/java/jre1.6.0_06/lib/javamail.providers (No such file or directory)
DEBUG: !anyLoaded
DEBUG: not loading resource: /META-INF/javamail.providers
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
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]}
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]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: !anyLoaded
DEBUG: not loading resource: /META-INF/javamail.address.map
DEBUG: not loading file: /usr/java/jre1.6.0_06/lib/javamail.address.map
DEBUG: java.io.FileNotFoundException: /usr/java/jre1.6.0_06/lib/javamail.address.map (No such file or directory)
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.studentjobexchange.com", port 587, isSSL false
javax.mail.MessagingException: Unknown SMTP host: smtp.studentjobexchange.com;
nested exception is:
java.net.UnknownHostException: smtp.studentjobexchange.com
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1389)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
at javax.mail.Service.connect(Service.java:310)
at javax.mail.Service.connect(Service.java:169)
at javax.mail.Service.connect(Service.java:118)
at javax.mail.Transport.send0(Transport.java:188)
at javax.mail.Transport.send(Transport.java:118)
at com.bramha.sje.util.SendMail.sendMail(SendMail.java:88)
at com.bramha.sje.views.SaveUserBean.save(SaveUserBean.java:352)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstValue.invoke(AstValue.java:172)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:387)
at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:316)
at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:291)
at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:248)
at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:461)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:147)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:276)
at org.ajax4jsf.Filter.doFilter(Filter.java:175)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.UnknownHostException: smtp.studentjobexchange.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1359)
... 43 more



Please help me if I am doing anything wrong.
The same code is working fine in my local machine but when i deploy on server, the exception comes.

Thanks in advance.

[Ulf Dittmer]

Caused by: java.net.UnknownHostException: smtp.studentjobexchange.com

That's the salient part. Is that host reachable from the machine where the code is running?

[Vikas Taank]

Yes
when I run the following command from command prompt:

ping studentjobexchange.com

Pinging studentjobexchange.com [206.188.212.77] with 32 bytes of data:
Reply from 206.188.212.77: bytes=32 time=56ms TTL=48
Reply from 206.188.212.77: bytes=32 time=53ms TTL=48
Reply from 206.188.212.77: bytes=32 time=53ms TTL=48
Reply from 206.188.212.77: bytes=32 time=58ms TTL=48

i

but when i ping smtp.studentjobexchange.com
I am getting this.
Pinging smtp.studentjobexchange.com.netsolmail.net [205.178.146.50] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

This is weird , Howsit running from my machine.

I am just curious if it has got something to do with firewall or port.
Moreover how do I know that smtp server is running on the machine where i have deployed my web app and moreover the port number at which, it is running.
I have already given the properties that I ma using and with the same properties , I am able to send mails from my local machine.

Thanks in advance