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我正尝试在java中编写一个应用程序来发送电子邮件，我在YouTube上找到了一个教程并试图关注它。但它不适合我还在上班，这里是错误我得到JavaMail无法发送电子邮件
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，什么是错的，什么是我在谷歌发现，没有帮助，
这里是代码
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();
}
为我工作（javax.mail 1.5.2）。当然你没有防火墙或路由器问题？ – MadProgrammer
你是否也考虑尝试一个新的端口587例如，但错误消息并不真正匹配你的源代码 – MadProgrammer
@MadProgrammer刚刚尝试过的错误是完全一样的，我可以用防火墙或路由器有什么样的问题？ – Jenny