【发布时间】：2014-05-28 15:13:48
【问题描述】：
我正在尝试通过 java 代码发送电子邮件.. 但出现异常.. 我不知道我哪里出错了.. 通过我的公司网络发送它..
public class SendingMail{
public static void main(String[] args) {
final String username = "xyz@company.com";
final String password = "********";
Properties props = new Properties();
props.put("mail.smtp.user", "xyz@company.com");
props.put("mail.smtp.password", "********");
props.put("mail.smtp.protocol", "smtp");
props.put("mail.smtp.host", "10.0.1.9");
props.put("mail.smtp.port", "80");
props.put("mail.smtp.starttls.enable","false");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.socketFactory.port", "80");
props.put("mail.smtp.socketFactory.class", "");
props.put("mail.smtp.socketFactory.fallback", "false");
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("dpaleti@avineonindia.com"));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("abc@company.com"));
message.setSubject("Testing Subject");
message.setText("Dear Mail Crawler,"
+ "\n\n No spam to my email, please!");
Transport.send(message);
System.out.println("Done");
} catch (MessagingException mex) {
mex.printStackTrace();
}
}
}
异常堆栈跟踪是：
javax.mail.MessagingException: Could not connect to SMTP host: 10.0.1.9, port: 80, response: -1
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1270)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at com.ex.mails.SendingMail.main(SendingMail.java:48)
我检查了 telnet 是否连接到我的服务器.. 它连接以及我可以 ping 到 10.0.1.9
将端口号更改为 25。现在我收到以下错误
javax.mail.MessagingException: Could not connect to SMTP host: 10.0.1.9, port: 25;
nested exception is:
java.net.SocketException: Network is unreachable: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1282)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at com.ex.mails.SendingMail.main(SendingMail.java:48)
Caused by: java.net.SocketException: Network is unreachable: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
... 7 more
【问题讨论】：
-
你在端口 80 上运行了 smtp - 这令人困惑。
-
您可以尝试连接到端口 25，这是 SMTP 的正确端口。
-
是的.. 在提供 telnet 10.0.1.9 8080 时检查 telnet 使用 80 作为连接的端口时出错！！
-
25 给出错误猜测我的公司网络不允许
-
刚刚使用 telnet 在 cmd 中检查了端口 25，它连接良好.. 对此感到抱歉，但是当我在代码中更改端口号时，它会给出错误 @MikeW