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javax.mail.MessagingException: Could not connect to SMTP
https://forum.linode.com/viewtopic.php?f=11&t=9172		 Page 1 of 1
Author:  keithphw [ Sat Jul 21, 2012 10:24 am ]
Post subject:  javax.mail.MessagingException: Could not connect to SMTP
Hi,

I've got a linode running with apache tomcat/catalina serving web pages on its own. The tomcat web application works well, but I can't configure it to send emails. I think it's because I am using the wrong mail host name, since tomcat gives the following exceptions:

Code:
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
  nested exception is:
   java.net.ConnectException: Connection refused
   at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
   at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
   at javax.mail.Service.connect(Service.java:295)
   at javax.mail.Service.connect(Service.java:176)
   at javax.mail.Service.connect(Service.java:125)
   at javax.mail.Transport.send0(Transport.java:194)
   at javax.mail.Transport.send(Transport.java:124)
   at core.AnswerResponseServlet.processRequest(AnswerResponseServlet.java:61)
   at core.AnswerResponseServlet.doPost(AnswerResponseServlet.java:213)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)
Caused by: java.net.ConnectException: Connection refused
   at java.net.PlainSocketImpl.socketConnect(Native Method)
   at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
   at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
   at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
   at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
   at java.net.Socket.connect(Socket.java:579)
   at java.net.Socket.connect(Socket.java:528)
   at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:319)
   at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:233)
   at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938)
   ... 26 more


My context.xml file's Context tag contains the following:
Code:
<Resource name="mail/Session" auth="Container" type="javax.mail.Session" mail.smtp.host="mail.plato" />


In the example here (http://tomcat.apache.org/tomcat-7.0-doc ... l_Sessions) they use "localhost" which is what i did too. I've also tried "mail.localhost", and since my computer's name is "plato", I've tried "plato" and "mail.plato". But all give me the same exception.

I read this javax.mail-related thread but I think it's an unrelated problem : viewtopic.php?p=26863

Any tips would be appreciated. I'm pretty sure that I'm just messing up the name of my mail server, so rather than localhost it's something else but I don't know what.

Thanks a lot,
Keith
Author:  glg [ Sat Jul 21, 2012 10:45 am ]
Post subject:  Re: javax.mail.MessagingException: Could not connect to SMTP
do you have a mail server (exim, postfix, etc) installed?
Author:  keithphw [ Sat Jul 21, 2012 6:55 pm ]
Post subject:  Re: javax.mail.MessagingException: Could not connect to SMTP
Thank you glg, you're right, I do not have a mail server. I thought that the javax.mail API did the mail server function but it doesn't. I'll work on getting Apache James (http://james.apache.org/) or postfix working.
Thanks a lot!
Keith
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