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PO
 

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  1. PO
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    <p>Had this exact same problem. You have to close the transport in the catch block. The reason the code freezes is because the smtp server connection never gets shut down on the client side unless you do it manually. </p> <pre><code> try { simpleMessage.setFrom(fromAddress); simpleMessage.setRecipient(RecipientType.TO, toAddress); simpleMessage.setSubject(subject); simpleMessage.setText(text); Transport.send(simpleMessage); // this is where code hangs } catch (MessagingException e) { // TODO Auto-generated catch block e.printStackTrace(); Transport.close() } </code></pre> <p>But the most efficient way to make sure javamail exits correctly is to bundle the javamail logic into one try block and close the transport in a finally block. Try this. <strong>[EDIT]</strong> After being alerted that the above code didn't work here is the code that compiles correctly.</p> <pre><code>import java.util.Properties; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.Message.RecipientType; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; //first from, to, subject, &amp; text values are set public class SendMail { private String from; private String to; private String subject; private String text; public SendMail(String from, String to, String subject, String text) { this.from = from; this.to = to; this.subject = subject; this.text = text; } // send method is called in the end public void send() throws MessagingException { Properties props = new Properties(); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.host", "localhost"); props.put("mail.smtp.auth", "false");// set to false for no username props.put("mail.debug", "false"); props.put("mail.smtp.port", "25"); Session session = Session.getDefaultInstance(props); InternetAddress fromAddress = null; InternetAddress toAddress = null; Transport transport = session.getTransport("smtp"); transport.connect(); try { Message simpleMessage = new MimeMessage(session); fromAddress = new InternetAddress(from); toAddress = new InternetAddress(to); simpleMessage.setFrom(fromAddress); simpleMessage.setRecipient(RecipientType.TO, toAddress); simpleMessage.setSubject(subject); simpleMessage.setText(text); transport.sendMessage(simpleMessage, simpleMessage.getAllRecipients()); } catch (MessagingException e) { e.printStackTrace(); } finally { transport.close(); } } } </code></pre>
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    1. POTransport.send(message) not working in the below code.. netbeans gets stuck at the running part. it doesn't proceed furthur.. it hangs there forever
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    1. USkslote1
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    1. COHave you tried running this code? The finally does not work because 'transport' should be 'Transport', and also because you cannot make a static reference to close().
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    2. COHi, thanks for pointing that out. I created an object with import javax.mail.Transport; and that allows you to close it in the finally block. I will edit this.
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    3. COYou should try actually running this code, there are a few issues with the way you have it now.
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