com.sun.mail.util.MailConnectException：無法連接到主機，端口：localhost，25;超時-1;

Question

package jmail; 

import java.util.Date; 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.AddressException; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 

public class HtmlJavaSend { 

public void sendHtmlEmail(String host, String port, 
     final String userName, final String password, String toAddress, 
     String subject, String message) throws AddressException, 
     MessagingException { 

    // sets SMTP server properties 
    Properties properties = new Properties(); 
    properties.put("mail.man.com", host); 
    properties.put("mail.25", port); 
    properties.put("mail.smtp.auth", "true"); 
    properties.put("mail.smtp.starttls.enable", "true"); 
    properties.put("mail.smtp.ssl.trust","mail.man.com"); 

    // creates a new session with an authenticator 
    Authenticator auth = new Authenticator() { 
     public PasswordAuthentication getPasswordAuthentication() { 
      return new PasswordAuthentication(userName, password); 
     } 
    }; 

    Session session = Session.getInstance(properties, auth); 

    // creates a new e-mail message 
    Message msg = new MimeMessage(session); 

    msg.setFrom(new InternetAddress(userName)); 
    InternetAddress[] toAddresses = {new InternetAddress(toAddress)}; 
    msg.setRecipients(Message.RecipientType.TO, toAddresses); 
    msg.setSubject(subject); 
    msg.setSentDate(new Date()); 
    // set plain text message 
    msg.setContent(message, "text/html"); 

    // sends the e-mail 
    Transport.send(msg); 

} 

public static void main(String[] args) { 
    // SMTP server information 
    String host = "mail.man.com"; 
    String port = "25"; 
    String mailFrom = "admin@man.com"; 
    String password = "Man"; 

    // outgoing message information 
    String mailTo = "ji@man.com"; 
    String subject = "Hello my friend"; 

    // message contains HTML markups 
    String message = "<i>Greetings!</i><br>"; 
    message += "<b>Wish you a nice day!</b><br>"; 
    message += "<font color=red>Duke</font>"; 

    HtmlJavaSend mailer = new HtmlJavaSend(); 

    try { 
     mailer.sendHtmlEmail(host, port, mailFrom, password, mailTo, 
       subject, message); 
     System.out.println("Email sent."); 
    } catch (Exception ex) { 
     System.out.println("Failed to sent email."); 
     ex.printStackTrace(); 
    } 
} } 

的錯誤是：

eror運行：無法發送電子郵件。 com.sun.mail.util.MailConnectException：無法連接到主機， port：localhost，25;超時-1;嵌套的異常是： java.net.ConnectException：連接被拒絕：在 com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:2100） 連接在 com.sun.mail.smtp.SMTPTransport.protocolConnect（ SMTPTransport.java:699） 在javax.mail.Service.connect（Service.java:388）處 javax.mail.Service.connect（服務 javax.mail.Service.connect（Service.java:246）。 java：195）at javax.mail.Transport.send0（Transport.java:254）at javax.mail.Transport.send（Transport.java:124）at jmail.HtmlJavaSend.sendHtmlEmail（HtmlJavaSend.java:62）在 jmail.HtmlJavaSend.main（HtmlJavaSend.java:85）導致： java.net.ConnectException：C onnection拒絕：在以 java.net.DualStackPlainSocketImpl.socketConnect（DualStackPlainSocketImpl.java:79） 在 java.net.AbstractPlainSocketImpl.doConnect java.net.DualStackPlainSocketImpl.connect0（本機方法）連接（AbstractPlainSocketImpl.java:339） 在 java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:200） 在 java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:182） 在java.net.PlainSocketImpl.connect（PlainSocketImpl.java:172） at java.net.SocksSocketImpl.connect（SocksSocketImpl.java:392）at java.net.Socket.connect（Socket.java:579）at java.net.Socket.connec t（Socket.java:528）at com.sun.mail.util.SocketFetcher.createSocket（SocketFetcher.java:331） at com.sun.mail.util.SocketFetcher.getSocket（SocketFetcher.java:238） at com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:2066） ... 8個BUILD SUCCESSFUL（總時間：1秒）

Answer 1

你有錯誤的位置：

​​

應該是：

properties.put("mail.smtp.host", host); 
properties.put("mail.smtp.port", port);