[英]Error in Sending mail by Java
我的代碼是:
// File Name SendEmail.java
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class SendEmail
{
public static void main(String [] args)
{
// Recipient's email ID needs to be mentioned.
String to = "toEmail@gmail.com";
// Sender's email ID needs to be mentioned
String from = "fromEmail@gmail.com";
// Assuming you are sending email from localhost
String host = "localhost";
// Get system properties
Properties properties = System.getProperties();
// Setup mail server
properties.setProperty("mail.smtp.host", host);
// Get the default Session object.
Session session = Session.getDefaultInstance(properties);
try{
// Create a default MimeMessage object.
MimeMessage message = new MimeMessage(session);
// Set From: header field of the header.
message.setFrom(new InternetAddress(from));
// Set To: header field of the header.
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(to));
// Set Subject: header field
message.setSubject("This is the Subject Line!");
// Now set the actual message
message.setText("This is actual message");
// Send message
Transport.send(message);
System.out.println("Sent message successfully....");
}catch (MessagingException mex) {
mex.printStackTrace();
}
}
}
我的節目昨晚工作正常; 我可以從任何地址向任何其他地址發送電子郵件,但現在出現此錯誤:
javax.mail.SendFailedException: Sending failed;
nested exception is:
class javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused
at javax.mail.Transport.send0(Transport.java:218)
at javax.mail.Transport.send(Transport.java:80)
at SendEmail.main(SendEmail.java:49)
第49行是:
Transport.send(message);
任何人都可以幫我解決這個錯誤嗎?
我的操作系統是:Linux,Fedora 16 -kernel:3.3.7
無法連接到SMTP主機:localhost,port:25;
SMTP必須不在您的系統上運行或作為用戶禁用。 請咨詢系統管理員並為您啟用它。
要檢查SMTP是否在Linux系統上運行,請嘗試以下命令:
netstat -an | grep 25
netstat -an | grep 25
telnet <yourhost-or-ipnumber> 25
echo -e "quit" | nc localhost 25
您應該檢查sendmail
守護程序是否已啟動且始終可用。
如果您可以訪問任何其他SMTP服務器,請嘗試使用其SMTP主機名發送郵件,以檢查您的代碼段是否正常工作。
示例: String host = "smtp.gmail.com";
這是因為我的SendMail服務停止工作。
啟用它:在shell中嘗試此命令(以root身份)。
service sendmail start
U在正確的方式..只是改變屬性設置和會話句.my java郵件工作精...
final String username = "abc@gmail.com";
final String password = "****";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
Session session = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
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