javax.mail.SendFailedException: Sending failed;
nested exception is:
class javax.mail.MessagingException: Unknown SMTP host: relay.jangosmtp.net;
nested exception is:
java.net.UnknownHostException: relay.jangosmtp.net
我真的很担心问题出在哪里。请帮我修复此错误。提前谢谢！
<%@ page import="java.io.*,java.util.*,javax.mail.*"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*"%>
<%
String result;
//Recipient's email ID needs to be mentioned.
String to = "abc@gmail.com";
// Sender's email ID needs to be mentioned
String from = "abc@gmail.com";
final String username = "username";
final String password = "251497PF";
// Assuming you are sending email through relay.jangosmtp.net
String host = "relay.jangosmtp.net";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", host);
props.put("mail.smtp.port", "25");
//Get the Session object.
Session mailSession = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username,
password);
}
});
try {
// Create a default MimeMessage object.
Message message = new MimeMessage(mailSession);
// Set From: header field of the header.
message.setFrom(new InternetAddress(from));
// Set To: header field of the header.
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(to));
// Set Subject: header field
message.setSubject("Testing Subject");
// Now set the actual message
message.setText("Hello, this is sample for to check send "
+ "email using JavaMailAPI in JSP ");
// Send message
Transport.send(message);
System.out.println("Sent message successfully....");
result = "Sent message successfully....";
} catch (MessagingException e) {
e.printStackTrace();
result = "Error: unable to send message....";
}
%>
<html>
<head>
<title>Send Email using JSP</title>
</head>
<body>
<center>
<h1>Send Email using JSP</h1>
</center>
<p align="center">
<%
out.println("Result: " + result + "\n");
%>
</p>
</body>
还有一个问题： - 在JangoSMTP中建立免费帐户后，它说要为Web应用程序提供IP地址。当我在本地计算机上使用Tomcat服务器时如何做到这一点。这可能是我错误的原因吗？