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POJavaMail SMTPSendFailedException
 

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  1. POJavaMail SMTPSendFailedException
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    <p>I am writing a bulk email program using the JavaMail api. I have a Microsoft Exhange server which I am trying to send the emails in to. When I run my program I get the following error:</p> <pre><code>**com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2057) at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1862) at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1100) at javax.mail.Transport.send0(Transport.java:195) at javax.mail.Transport.send(Transport.java:124) at SendEmail.postMail(SendEmail.java:100) at EmailGenerator.main(EmailGenerator.java:52)** </code></pre> <p>The part of my code trying to send the message is as follows:</p> <pre><code>Properties props = new Properties(); props.put("mail.smtp.host", email_server); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.auth", true); class EmailAuthenticator extends Authenticator { String user; String pw; EmailAuthenticator (String FROM, String PASSWORD) { super(); this.user = FROM; this.pw = PASSWORD; } public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(user, pw); } } Session session = Session.getInstance(props, new EmailAuthenticator(USER, PASSWORD)); session.setDebug(debug); System.out.println("Session created"); .. CREATED MESSAGE HERE... Transport transport = session.getTransport("smtp"); transport.connect(exchange_server,user,password); transport.send(msg); transport.close(); </code></pre> <p>I wonder am I missing some configuration on the Exchange server side, or is an issue with my code?</p>
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    1. USDukeOfMarmalade
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    1. CONot the most helpful exception in the world. What happens if you turn on debugging with `props.put("mail.debug", "true");`?
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      1. USEdward Thomson
    2. COEdward is right - we need the actual SMTP response from the server. One other thing you can check is wether your server is allowed to send mails via the Exchange server. By default, only authenticated users are permitted.
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      1. USHenning Krause
 

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