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[英]Sending mail error, javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
[英]Sending emails through Java - javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 587;
我目前正在從事一個涉及創建.jar文件的項目。 要實現以下目標,我應該導出/讀取朋友注冊表的路徑,一旦完成,我應該通過電子郵件取回結果。 整個概念是創建jar文件,一旦單擊它,由於實際上是通過電子郵件發送的,因此我會通過電子郵件獲取結果。
(我希望這是有道理的)
因此,首先,我組合了以下代碼以實際讀取注冊表並顯示鍵(我從堆棧溢出的流行帖子中獲取了讀取/寫入注冊表),因此讀取過程運行正常,現在我的問題是電子郵件代碼,
(我不太確定此代碼的原始所有者是誰,但他應全力以赴)。我正在嘗試使此電子郵件代碼的基本概念生效,以便我可以繼續將jar文件作為附件,並將其鏈接到我的代碼,方式是當用戶單擊jar文件時,注冊表結果將通過電子郵件發送給我。
import java.util.Properties;
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 MailCode {
public static void main(String[] args) throws Exception {
final String smtp_host = "smtp.gmail.com";
final String smtp_username = "user@gmail.com";
final String smtp_password = "password";
final String smtp_connection = "TLS"; // Use 'TLS' or 'SSL' connection
final String toEmail="tomail@hotmail.com";
final String fromEmail="**@gmail.com";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
if (smtp_connection.equals("TLS")) {
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.port", "587");
} else{
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.port", "465");
}
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(smtp_username, smtp_password);
}
});
try {
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(fromEmail, "NoReply"));
msg.addRecipient(Message.RecipientType.TO,
new InternetAddress(toEmail, "Mr. Recipient"));
msg.setSubject("Welcome To JavaMail API");
msg.setText("JavaMail API Test - Sending email example through remote smtp server");
Transport.send(msg);
System.out.println("Email sent successfully...");
} catch (AddressException e) {
throw new RuntimeException(e);
} catch (MessagingException e) {
throw new RuntimeException(e);
}
}
}
這是我收到的錯誤消息:
Exception in thread "main" java.lang.RuntimeException: javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 587;
nested exception is:
java.net.SocketException: Permission denied: connect
您正在設置smtp_host
但從未使用過。
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 587;
您正在嘗試連接到“ localhost”而不是gmail.com。 那是因為您不在任何地方設置mail.smtp.host
。
以及為什么要在非 -TLS情況下設置SSL套接字工廠?
以下代碼可以幫助您解決問題,它的工作.....
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class Email {
private static String USER_NAME = "username"; // GMail user name (just the part before "@gmail.com")
private static String PASSWORD = "password"; // GMail password
private static String RECIPIENT = "xxxxx@gmail.com";
public static void main(String[] args) {
String from = USER_NAME;
String pass = PASSWORD;
String[] to = { RECIPIENT }; // list of recipient email addresses
String subject = "Java send mail example";
String body = "hi ....,!";
sendFromGMail(from, pass, to, subject, body);
}
private static void sendFromGMail(String from, String pass, String[] to, String subject, String body) {
Properties props = System.getProperties();
String host = "smtp.gmail.com";
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.ssl.trust", host);
props.put("mail.smtp.user", from);
props.put("mail.smtp.password", pass);
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props);
MimeMessage message = new MimeMessage(session);
try {
message.setFrom(new InternetAddress(from));
InternetAddress[] toAddress = new InternetAddress[to.length];
// To get the array of addresses
for( int i = 0; i < to.length; i++ ) {
toAddress[i] = new InternetAddress(to[i]);
}
for( int i = 0; i < toAddress.length; i++) {
message.addRecipient(Message.RecipientType.TO, toAddress[i]);
}
message.setSubject(subject);
message.setText(body);
Transport transport = session.getTransport("smtp");
transport.connect(host, from, pass);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
catch (AddressException ae) {
ae.printStackTrace();
}
catch (MessagingException me) {
me.printStackTrace();
}
}
}
請檢查您的防病毒/惡意軟件。
如果您使用的是公司開發人員計算機,請與管理員聯系以刪除該訪問保護規則。
我遇到了同樣的問題,我的McAfee阻止了所有請求。
被端口阻止規則C:\\ PROGRAM FILES \\ JAVA \\ JDK1.8.0_74 \\ BIN \\ JAVAW.EXE阻止防病毒標准保護:防止大量郵件蠕蟲發送郵件0:0:0:0:0:ffff:4a7d: 7e6d:587
在訪問保護日志中找到了此內容,並要求我的管理員刪除該規則。
試試這個可能對您有幫助。
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