Question

我正在尝试编写一个简单的邮件发件人类，它将接收一堆参数，并使用这些参数将使用我们的Exchange 2010服务器发送电子邮件。虽然身份验证等似乎工作正常，但当代码实际上尝试发送电子邮件时，我得到以下异常（我认为）。我已确保身份验证正在运行，我从会话中获取传输，但仍然失败。任何人都可以对我做错了什么或丢失了吗？感谢。

例外：

javax.mail.MessagingException: [EOF]
       at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1481)
       at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1512)
       at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1054)
       at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:634)
       at javax.mail.Transport.send0(Transport.java:189)
       at javax.mail.Transport.send(Transport.java:140)
       at com.ri.common.mail.util.MailSender.sendHTMLEmail(MailSender.java:75)
       at com.ri.common.mail.util.MailSender.main(MailSender.java:106)

相关代码：

import java.util.Properties;

import javax.mail.Authenticator;
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 MailSender
{
    public static void sendHTMLEmail( String fromEmailId, String toEmailId, String host, String hostUserName,
            String hostPassword, String mailSubject, String mailBody )
    {
        // Get system properties.
        Properties props = System.getProperties();
        // Setup mail server
        props.put( "mail.transport.protocol", "smtp" );
        props.put( "mail.smtp.host", host );
        props.put( "mail.smtp.auth", "true" );

        final String hostUName = hostUserName;
        final String hPassword = hostPassword;

        Authenticator authenticator = new Authenticator()
        {
            protected PasswordAuthentication getPasswordAuthentication()
            {
                return new PasswordAuthentication( hostUName, hPassword );
            }
        };

        // Get the default Session object.
        Session session = Session.getDefaultInstance( props, authenticator );

        try
        {
            // Create a default MimeMessage object.
            MimeMessage message = new MimeMessage( session );

            // Set From: header field of the header.
            message.setFrom( new InternetAddress( fromEmailId ) );

            // Set To: header field of the header.
            message.addRecipient( Message.RecipientType.TO, new InternetAddress( toEmailId ) );

            // Set Subject: header field
            message.setSubject( mailSubject );

            // Send the actual HTML message, as big as you like
            message.setContent( mailBody, "text/html" );

            // Send message
            Transport.send( message, message.getAllRecipients() );
            System.out.println( "Sent message successfully...." );
        }
        catch( Exception mex )
        {
            mex.printStackTrace();
        }

    }

    public static void main( String[] args )
    {

        String to = "someCorrectEmailID@xyz.com";
        String from = "someCorrectEmailID@xyz.com";
        String host = "correctHostForExch2010";
        String user = "correctUser";
        String password = "CorrectPassword";
        String subject = "Test Email";
        String body = "Hi there. This is a test email!";

        MailSender.sendHTMLEmail( from, to, host, user, password, subject, body );
    }
}

编辑：我打开调试，它说

MAIL FROM:<someCorrectEmailID@xyz.com> 530 5.7.1 Client was not authenticated 
DEBUG SMTP: got response code 530, with response: 530 5.7.1 Client was not authenticated.

当会话认证成功时，为什么会这样？

Answer 1

感谢Alex和Bill。我通过启用以下属性来实现它。

props.put("mail.smtp.starttls.enable", "true");

Answer 2

两种可能性：

由于您使用Session.getDefaultInstance。
它没有进行身份验证，因为它没有找到客户端和服务器都支持的任何身份验证机制，可能是因为服务器希望您在发送任何身份验证信息之前使用SSL。尝试将“mail.smtp.starttls.enable”设置为“true”。

如果我们能看到更多的调试输出，我们可以告诉你这是哪种情况。

Answer 3

我也有这个错误跟踪我的更正是：

对于OS centos7：去vi / etc / hosts 并验证IP地址是否正确

JavaMail - javax.mail.MessagingException

3 个答案: