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我正嘗試在java中編寫一個應用程序來發送電子郵件，我在YouTube上找到了一個教程並試圖關注它。但它不適合我還在上班，這裏是錯誤我得到JavaMail無法發送電子郵件
Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25, response: 421
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1949)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
at javax.mail.Service.connect(Service.java:295)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at libraryFineList.ParseRecords.main(ParseRecords.java:90)
我不知道，什麼是錯的，什麼是我在谷歌發現，沒有幫助，
這裏是代碼
public static void main(String[] args) throws IOException, MessagingException {
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", 465);
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator(){
protected PasswordAuthentication getPasswordAuthentication(){
return new PasswordAuthentication("[email protected]", "pass");
}
}
);
try{
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("[email protected]"));
message.addRecipient(Message.RecipientType.TO,
new InternetAddress("[email protected]", "Mr. User"));
message.setSubject("Your Example.com account has been activated");
message.setText("Worked");
Transport.send(message);
}catch(Exception e){
e.printStackTrace();
}
爲我工作（javax.mail 1.5.2）。當然你沒有防火牆或路由器問題？ – MadProgrammer
你是否也考慮嘗試一個新的端口587例如，但錯誤消息並不真正匹配你的源代碼 – MadProgrammer
@MadProgrammer剛剛嘗試過的錯誤是完全一樣的，我可以用防火牆或路由器有什麼樣的問題？ – Jenny