javax.mail.MessagingException: No se pudo conectar al host SMTP: smtp.gmail.com, puerto: 25;

Question

El código que estoy usando para enviar un simple correo

import javax.mail.*; 
import javax.mail.internet.*; 
import java.util.*; 
import java.io.*; 
import javax.activation.DataHandler; 
import javax.activation.FileDataSource; 

public class SendMailUsingAuthentication 
{ 

    private static final String SMTP_HOST_NAME = "smtp.gmail.com"; 
    private static final String SMTP_AUTH_USER = "myemail@gmail.com"; 
    private static final String SMTP_AUTH_PWD = "mypassword"; 

    public static void main(String args[]) throws Exception 
    { 

    } 

    public void postMail(String recipients[ ], String subject,String message , String from) throws MessagingException 
    { 
    try { 
     boolean debug = false; 

     Properties props = new Properties(); 
     props.put("mail.smtp.host", SMTP_HOST_NAME); 
     props.put("mail.smtp.starttls.enable", "true"); 
     props.put("mail.smtp.auth", "true"); 
     Authenticator auth = new SMTPAuthenticator(); 
     Session session = Session.getDefaultInstance(props, auth); 
     session.setDebug(debug); 

     Message msg = new MimeMessage(session); 

     InternetAddress addressFrom = new InternetAddress(from); 
     msg.setFrom(addressFrom); 
     InternetAddress[] addressTo = new InternetAddress[recipients.length]; 
     for (int i = 0; i < recipients.length; i++) { 
      addressTo[i] = new InternetAddress(recipients[i]); 
     } 
     msg.setRecipients(Message.RecipientType.TO, addressTo); 

     msg.setSubject(subject); 

     msg.setContent(message, "text/plain"); 

     Transport.send(msg); 

    } 
    catch (Throwable e) 
    { 
     e.printStackTrace(); 
    } 
} 
/** 
* SimpleAuthenticator is used to do simple authentication 
* when the SMTP server requires it. 
*/ 
private class SMTPAuthenticator extends javax.mail.Authenticator 
{ 
    public PasswordAuthentication getPasswordAuthentication() 
    { 
     String username = SMTP_AUTH_USER; 
     String password = SMTP_AUTH_PWD; 
     return new PasswordAuthentication(username, password); 
    } 
} 
} 

Cuando estoy ejecutando el código en mi máquina local, que está funcionando bien .... pero cuando desplegué en el servidor es darme esta excepción

javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25; 
    nested exception is: 
    java.net.ConnectException: Connection timed out 
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1282) 
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370) 
    at javax.mail.Service.connect(Service.java:297) 
    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 SendMailUsingAuthentication.postMail(SendMailUsingAuthentication.java:97) 
    at RegistrationServlet.doGet(RegistrationServlet.java:98) 
    at RegistrationServlet.doPost(RegistrationServlet.java:125) 
    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:304) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) 
    at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:196) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:662) 
Caused by: java.net.ConnectException: Connection timed out 
    at java.net.PlainSocketImpl.socketConnect(Native Method) 
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) 
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) 
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) 
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) 
    at java.net.Socket.connect(Socket.java:529) 
    at java.net.Socket.connect(Socket.java:478) 
    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) 

Answer 1

suena como un problema de cortafuegos (firewalls silencio caer los paquetes que no están permitidos, por lo que se vería a un tiempo de espera de conexión.

se puede tratar

H:\> telnet smtp.gmail.com 25 
Connecting To smtp.gmail.com...Could not open connection to the host, on port 25 
: Connect failed 

en su servidor y vea si obtiene una conexión? (Estoy detrás de un servidor de seguridad aquí que no permite las conexiones a Gmail)

Answer 2

Mientras se ejecuta en jboss, compruebe si se está ejecutando utilizando run.bat -b 0.0.0.0.

Si no lo intenta, debería funcionar bien.