Java Mail-Ausnahmefehler;

Question

Apr 10, 2012, 11:03 AM

Java Mail-Ausnahmefehler;

MyCode:

<code>import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class SendMailTLS {
public static void main(String[] args) {
    final String username = "[email protected]";
    final String password = "myemailpassword";
    Properties props = new Properties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");
    Session session = Session.getInstance(props,
      new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
      });

    try {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler,"+
 "\n\n No spam to my email,please!"); 
        Transport.send(message);
        System.out.println("Done");
    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}
}
</code>

Mein Fehler:

Ausnahme im Thread "main" java.lang.RuntimeException: javax.mail.MessagingException:
Unbekannter SMTP-Host: smtp.gmail.com;
verschachtelte Ausnahme ist:
java.net.UnknownHostException: smtp.gmail.com
bei Mail.SendMailTLS.main (SendMailTLS.java:56)
Auslöser: javax.mail.MessagingException: Unbekannter SMTP-Host: smtp.gmail.com;
verschachtelte Ausnahme ist:
java.net.UnknownHostException: smtp.gmail.com
um com.sun.mail.smtp.SMTPTransport.openServer (SMTPTransport.java:1970)
at com.sun.mail.smtp.SMTPTransport.protocolConnect (SMTPTransport.java:642)
um javax.mail.Service.connect (Service.java:317)
um javax.mail.Service.connect (Service.java:176)
um javax.mail.Service.connect (Service.java:125)
um javax.mail.Transport.send0 (Transport.java:194)
um javax.mail.Transport.send (Transport.java:124)
bei Mail.SendMailTLS.main (SendMailTLS.java:51)
Auslöser: java.net.UnknownHostException: smtp.gmail.com
at java.net.PlainSocketImpl.connect (PlainSocketImpl.java:177)
bei java.net.SocksSocketImpl.connect (SocksSocketImpl.java:366)
bei java.net.Socket.connect (Socket.java:525)
bei java.net.Socket.connect (Socket.java:475)
at com.sun.mail.util.SocketFetcher.createSocket (SocketFetcher.java:319)
at com.sun.mail.util.SocketFetcher.getSocket (SocketFetcher.java:233)
um com.sun.mail.smtp.SMTPTransport.openServer (SMTPTransport.java:1938)
... 7 mehr
Java Ergebnis: 1