Connection timed out: connect at com.sun.mail.imap.IMAPStore.protocolConne

Question

Hi ,
Recently, my team need to work with javamail. Here I got a problem: when I run the application in my personal home network , it goes on very well. When I run the program in my company env, it gives error info:
Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
nested exception is:
java.net.ConnectException: Connection timed out: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1706)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:525)
at javax.mail.Service.connect(Service.java:313)
The resource is :
import java.security.Security;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
*Use Gmail
public class GmailSender {
public static void main(String[] args) throws AddressException, MessagingException {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
// Get a Properties object
Properties props = System.getProperties();
//Add proxy for GmailSender
//especially here, I am not sure whether the proxy really works. In home network, it needn't proxy to run successfully.
// props.setProperty("proxySet","true");
// props.setProperty("socksProxyHost","148.87.19.20"); // This IP address is our proxy server address
// props.setProperty("socksProxyPort","80");
props.setProperty("mail.smtp.host", "smtp.gmail.com");
props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
props.setProperty("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.auth", "true");
final String username = "XXX";
final String password = "XXX";
Session session = Session.getDefaultInstance(props, new Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
// -- Create a new message --
Message msg = new MimeMessage(session);
// -- Set the FROM and TO fields --
msg.setFrom(new InternetAddress(username + "@gmail.com"));
msg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("[email protected]",false));
msg.setSubject("Hello");
msg.setText("How are you");
msg.setSentDate(new Date());
Transport.send(msg);
System.out.println("Message sent.");
Will you please help me to review my code and give me some suggestions ?

Answer 1

No point looking at the code. The error message says the code can't connect to the server you are trying to connect to, so presumably there's a firewall or something like that preventing the connection. Talk to your network people.