Hallo Community,

ich tüftel bereits den ganzen Tag an meiner Mailsender Klasse. Ich versuche aus meinem Programm via SMTP eine Mail zu versenden.

Folgendes irritiert mich aber: Wenn ich meine Mailsender-Klasse als JUnit-Test laufen lasse, wird die Mail verschickt. TOP!

Wenn ich die Mailsender-Klasse aber in mein Hauptprogramm einbinde (exakt genau so wie im JUnit-Test), bekomm ich folgende Exception, wenn ich vorher nicht überprüfe, ob der Mailserver erreichbar ist.

Code java:

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<javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;   nested exception is:     java.net.ConnectException: Connection refused: connect> javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;   nested exception is:     java.net.ConnectException: Connection refused: connect     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:275)     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 de.util.MailUtils.createAndSend(MailUtils.java:113) Caused by: java.net.ConnectException: Connection refused: connect     at java.net.PlainSocketImpl.socketConnect(Native Method)     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)     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)     ... 12 more

Zeile 113 entspricht im Code Zeile 82.

Wenn ich nun überprüfe, ob der Mailserver verfügbar ist, bekomm ich folgende Exception:

Code java:

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<javax.mail.NoSuchProviderException: Invalid protocol: null> javax.mail.NoSuchProviderException: Invalid protocol: null     at javax.mail.Session.getProvider(Session.java:431)     at javax.mail.Session.getStore(Session.java:530)     at javax.mail.Session.getStore(Session.java:510)     at javax.mail.Session.getStore(Session.java:496)     at de.util.MailUtils.isReachable(MailUtils.java:140)

Zeile 140 entspricht im Code 109.

Hier ist noch mein Code den ich verwende:

Code java:

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/**  */     public static final String SMTP = "smtp";     /**  */     public static final String MAIL_SMTP_HOST = "mail.smtp.host";     /**  */     public static final String MAIL_SMTP_PORT = "mail.smtp.port";     /**  */     public static final String MAIL_TRANSPORT_PROTOCOL = "mail.transport.protocol";     /**  */     public static final int DEFAULT_SMTP_PORT = 25;       private MailUtils() {     }       /**      * @param mailProps      * @param from      * @param recipient      * @param subject      * @param content      * @param attachment      * @throws MessagingException      */     public static void createAndSend(Properties mailProps, String from, String[] recipient,             String subject, String content, File[] attachment)     throws MessagingException {         Session session = Session.getDefaultInstance(mailProps);         session.setDebug(true);         session.setDebugOut(System.out);                 Message message = new MimeMessage(session);           // ----------------------------------------------------------------------         // Meta-Data         // ----------------------------------------------------------------------           // From         message.setFrom(new InternetAddress(from));           // Recipients         InternetAddress[] recipients = new InternetAddress[recipient.length];         for(int i = 0; i < recipient.length; i++) {             recipients[i] = new InternetAddress(recipient[i]);         }         message.setRecipients(Message.RecipientType.TO, recipients);           // Subjectline         message.setSubject(subject);           // ----------------------------------------------------------------------         // Content         // ----------------------------------------------------------------------         MimeMultipart mimeMultipart = new MimeMultipart();           MimeBodyPart contentBody = new MimeBodyPart();         contentBody.setText(content);         contentBody.setDisposition(MimeBodyPart.INLINE);         mimeMultipart.addBodyPart(contentBody);           // ----------------------------------------------------------------------         // Attachments         // ----------------------------------------------------------------------         for(File file : attachment) {             if(file != null && file.exists() && file.canRead()) {                 MimeBodyPart attachmentBody = new MimeBodyPart();                 attachmentBody.setDataHandler(new DataHandler(new FileDataSource(file)));                 attachmentBody.setFileName(file.getName());                 attachmentBody.setDisposition(MimeBodyPart.ATTACHMENT);                                 mimeMultipart.addBodyPart(attachmentBody);              }         }           // ---         // save         message.setContent(mimeMultipart);         message.saveChanges();           // send         Transport.send(message);     }         /**      * @param smtpHost      * @param port      * @return the Properties with the Transportprotocol and SMTP-Host      */     public static Properties createSmtpMailProperties(String smtpHost, int port) {         Properties mailProps = new Properties();         mailProps.put(MAIL_TRANSPORT_PROTOCOL, SMTP);         mailProps.put(MAIL_SMTP_HOST, smtpHost);         mailProps.put(MAIL_SMTP_PORT, String.valueOf(port));         return mailProps;     }         /**      * @param host      * @param port      * @return true if the MailRelay is reachable.      */     public static boolean isReachable(String host, int port) {         Properties properties = createSmtpMailProperties(host, port);         Session s = Session.getDefaultInstance(properties);         try {             Transport transport = s.getTransport();             transport.connect();             return true;         } catch(MessagingException e) {             e.printStackTrace();         }         return false;     }

Die Debugausgabe hat folgendes ergeben:

Code java:

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DEBUG: setDebug: JavaMail version 1.4ea DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth false DEBUG SMTP: trying to connect to host "localhost", port 25, isSSL false

Ich hoffe, dass mir bei dem Problem jemand auf die Sprünge helfen kann.

Gruß

Fabio

Problem gelöst!
Es lag an folgender Ursache: Da in dem Programm verschiedene SMTP-Verbindungen sind, darf man im Code nicht schreiben

Code java:

1	Session.getDetaulfIntsance(properties, null)

sondern

Code java:

1	Session.getInstance(properties, null)

Dann werden nicht die globalen SMTP-Einstellungen verwendet, sondern die Properties, die übergeben werden.

Gruß

Fabio