使用javax.mail发送消息

Question

我想使用javax.mail从example@uni.ac.uk发送电子邮件到receive@uni.ac.uk。 我试过下面的代码，但它给出了错误，我也放在下面。 欢迎任何帮助。

    Properties prop = new Properties();
    Session sess = Session.getDefaultInstance(prop,null);

    Message msg = new MimeMessage(sess);
    msg.setFrom(new InternetAddress("example@uni.ac.uk", "Sender"));
             msg.addRecipient(Message.RecipientType.TO,
                      new InternetAddress("receiver@uni.ac.uk", "Receiver"));
            msg.setSubject("Your Example.com account has been activated");
            msg.setText("Testing messgage");
           Transport.send(msg);


}

产生的错误是

Exception in thread "main" javax.mail.MessagingException: Could not connect to
SMTP host: localhost, port: 25; nested exception is: java.net.SocketException: Permission denied: connect at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1962) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654) at javax.mail.Service.connect(Service.java:295) at javax.mail.Service.connect(Service.java:176) at javax.mail.Service.connect(Service.java:125) at javax.mail.Transport.send0(Transport.java:194) at javax.mail.Transport.send(Transport.java:124) at MAIL.sendmail.main(sendmail.java:41) Caused by: java.net.SocketException: Permission denied: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(Unknown Source) at java.net.PlainSocketImpl.connectToAddress(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:321) at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:237) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1928) ... 7 more

Answer 1

这是使用gmail发送电子邮件的示例属性：

private Properties createConfiguration() {
    return new Properties() {{
        put("mail.smtp.auth", "true");
        put("mail.smtp.host", "smtp.gmail.com");
        put("mail.smtp.port", "587");
        put("mail.smtp.starttls.enable", "true");
    }};
}

Answer 2

您将“属性”对象中的SMTP服务器设置为您自己的计算机（本地主机），这显然未在端口25上运行SMTP服务器。我认为您想使用现有的SMTP服务器（例如从互联网提供商处获得的SMTP服务器，或GMail为您提供的邮件等）。