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我正在使用 .bns 邮件服务器发送邮件。我已确认服务器已启动并正在运行，并且端口号 25 已打开以供连接。我的防火墙已关闭，我认为“telnet mailrelay.bns 25”不应该让我连接到邮件服务器。我已经编译了我的代码并在命令行上运行。我也在另一个IDE环境中运行过。它总是给我同样的问题：连接被拒绝。该代码在另一个站点上运行，并且可以正常发送电子邮件。确切的代码在某个时间之前在我的工作站上运行。我很确定这是一些配置问题。但是，我不记得对系统设置或互联网设置进行过任何更改。所以我很难弄清楚出了什么问题。以下是我的简单测试代码：

private Logger      logger              = Logger.getLogger(this.getClass());

public static void main(String[] args)
{
    String mailHost         = "mailrelay.bns";
    String mailFrom         = "yyyy@yyy.com";
    String mailTo           = "xxxx@xxx.com";

    String msg = "<html><body><p>hi</p></body></html>";
    String subject = "MailUtilTest";
    MailUtil mailUtil = new MailUtil();
    mailUtil.sendMail2(msg, mailTo, subject, mailHost, mailFrom);
}

public void sendMail2(String msg, String mailTo, String subject, String mailHost, String mailFrom) {
    Properties properties = System.getProperties();
    properties.setProperty("mail.smtp.host", mailHost);
    Session session = Session.getDefaultInstance(properties);

    try {
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(mailFrom));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(mailTo));
        message.setSubject(subject);
        message.setText(msg);
        Transport.send(message);
        System.out.println("Message sent successfully...");
    } catch (MessagingException mex) {
        mex.printStackTrace();
    }
}

以下是我收到的确切错误消息：

com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mailrelay.bns, 25; timeout -1;
  nested exception is:
    java.net.ConnectException: Connection refused: connect
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1961)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
    at javax.mail.Service.connect(Service.java:345)
    at javax.mail.Service.connect(Service.java:226)
    at javax.mail.Service.connect(Service.java:175)
    at javax.mail.Transport.send0(Transport.java:253)
    at javax.mail.Transport.send(Transport.java:124)
    at com.scotiabank.sco.sched.commonutilities.MailUtil.sendMail2(MailUtil.java:76)
    at com.scotiabank.sco.sched.commonutilities.MailUtilTest.sendMail2Test(MailUtilTest.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:611)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
    at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
    at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
    at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
    at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
    at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:381)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:243)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:230)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:377)
    at java.net.Socket.connect(Socket.java:539)
    at java.net.Socket.connect(Socket.java:488)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:297)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:229)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)
    ... 30 more
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1 回答 1

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  1. 尝试从给您带来问题的盒子中通过 telnet 连接到端口 25
  2. 检查邮件服务器上的防火墙和 iptable 设置
  3. 查看邮件服务器上的相关日志
于 2013-06-06T18:43:30.687 回答