用javamail发信，提示如下错误，为什么？

Question

smtp.sina.com.cn???什么意思？
协议和服务器混为一谈？！！！！！

Answer 1

telnet smtp.sina.com.cn 25ehlo或helo看看该服务器支持什么样的东东

Answer 2

看了，是下面这些，什么意思啊？
250-sina.com
250-AUTH=LOGIN
250-AUTH LOGIN
250-PIPELINING
250 8BITMIME
250 sina.com

Answer 3

Properties props = System.getProperties();
        props.put("mail.host", host);
        props.put("mail.transport.protocol", "smtp");

Answer 4

Properties properties = System.getProperties();
                    properties.put("mail.smtp.host","smtp.sina.com.cn");
                    properties.put("mail.transport.protocol", "smtp");
                    properties.put("mail.smtp.auth","true");
                    Session session = Session.getInstance(properties,
                            new Authenticator() {
                        protected PasswordAuthentication getPasswordAuthentication() {
                            return new PasswordAuthentication("myusername","mypassword");
                        }
                    });                    try
                        {
                          MimeMessage message = new MimeMessage(session);
                          message.setFrom(new InternetAddress(strFrom));                          InternetAddress[] toadd = InternetAddress.parse(strEmail);
                          message.setRecipients(Message.RecipientType.TO,toadd);                          message.setSubject(strSubject);
                          message.setText(strFullMailText);                          Transport transport = session.getTransport();
                          message.saveChanges();
                          transport.send(message,message.getAllRecipients());
                          transport.close();                        }
                        catch (AddressException e)
                        {
                            System.out.println("There was an error parsing the addresses.");
                            System.out.println(e.getMessage());
                        }
                        catch (SendFailedException e)
                        {
                            System.out.println("There was an error sending the message.");
                            System.out.println(e.getMessage());
                        }
                        catch (MessagingException e)
                        {
                            System.out.println("There was an unexpected eorror.");
                            System.out.println(e);
                    }
楼上的，这是我的程序，照你的方法改了，好了
什么错误都不提示了
可就是没有收到信，见鬼了

Answer 5

如果你用的TOMCAT。你可以看看tomcat代的例子。能简单