java javamail 错误：必须首先发出 starttls 命令
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javamail error: must issue starttls command first
提问by simplyblue
I'm trying to send a mail using javamail api using the below code: when I compile the class file I'm getting the below error which says 'must issue starttls command first' I have mentioned the error below. And also getProvider()function error I think so... I don' t know what the errors mean.
我正在尝试使用以下代码使用 javamail api 发送邮件：当我编译类文件时，我收到以下错误，提示“必须首先发出 starttls 命令”我在下面提到了错误。还有getProvider()函数错误，我认为是这样...我不知道这些错误是什么意思。
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.event.*;
import javax.mail.Authenticator;
import java.net.*;
import java.util.Properties;
public class mailexample
{
public static void main (String args[]) throws Exception {
String from = args[0];
String to = args[1];
try
{
Properties props=new Properties();
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.host","smtp.gmail.com");
props.put("mail.smtp.port", "25");
props.put("mail.smtp.auth", "true");
javax.mail.Authenticator authenticator = new javax.mail.Authenticator()
{
protected javax.mail.PasswordAuthentication getPasswordAuthentication()
{
return new javax.mail.PasswordAuthentication("[email protected]", "pass");
}
};
Session sess=Session.getDefaultInstance(props,authenticator);
sess.setDebug (true);
Transport transport =sess.getTransport ("smtp");
Message msg=new MimeMessage(sess);
msg.setFrom(new InternetAddress(from));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
msg.setSubject("Hello JavaMail");
msg.setText("Welcome to JavaMail");
transport.connect();
transport.send(msg);
}
catch(Exception e)
{
System.out.println("err"+e);
}
}
}
error:
错误：
C:\Users\bobby\Desktop>java mailexample [email protected] abc@gmail. com DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.s mtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: useEhlo true, useAuth true DEBUG: SMTPTransport trying to connect to host "smtp.gmail.com", port 25 DEBUG SMTP RCVD: 220 mx.google.com ESMTP q10sm12956046rvp.20 DEBUG: SMTPTransport connected to host "smtp.gmail.com", port: 25 DEBUG SMTP SENT: EHLO bobby-PC DEBUG SMTP RCVD: 250-mx.google.com at your service, [60.243.184.29] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250 ENHANCEDSTATUSCODES DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.s mtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: useEhlo true, useAuth true DEBUG: SMTPTransport trying to connect to host "smtp.gmail.com", port 25 DEBUG SMTP RCVD: 220 mx.google.com ESMTP l29sm12930755rvb.16 DEBUG: SMTPTransport connected to host "smtp.gmail.com", port: 25 DEBUG SMTP SENT: EHLO bobby-PC DEBUG SMTP RCVD: 250-mx.google.com at your service, [60.243.184.29] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250 ENHANCEDSTATUSCODES DEBUG SMTP SENT: MAIL FROM: DEBUG SMTP RCVD: 530 5.7.0 Must issue a STARTTLS command first. l29sm12930755rvb .16 DEBUG SMTP SENT: QUIT errjavax.mail.SendFailedException: Sending failed; nested exception is: javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command f irst. l29sm12930755rvb.16
回答by YOU
Probably, you need to put props.put("mail.smtp.starttls.enable","true");before you authenticate.
可能，您需要props.put("mail.smtp.starttls.enable","true");在进行身份验证之前放置。
回答by Suhrud B
This code seems to work fine using the Gmail SMTP server to send emails. Note - This does not have an attachment.
使用 Gmail SMTP 服务器发送电子邮件时，此代码似乎可以正常工作。注意 - 这没有附件。
(Source : Modified from the example on https://forums.oracle.com/forums/thread.jspa?threadID=1587188)
（来源：修改自https://forums.oracle.com/forums/thread.jspa?threadID=1587188上的示例）
package org.ssb.mail;
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 MailClient {
/**
* Entry method
*
* @param args
* String[]
*/
public static void main(String[] args) {
MailClient client = new MailClient();
try {
client.sendMail();
} catch (AddressException ae) {
ae.printStackTrace();
} catch (MessagingException me) {
me.printStackTrace();
}
}
/**
* Sends an email
*
* @param none
*/
private void sendMail() throws AddressException, MessagingException {
// Get a Properties object
Properties props = System.getProperties();
// ******************** FOR PROXY ******************
// props.setProperty("proxySet","true");
// props.setProperty("socksProxyHost","9.10.11.12");
// props.setProperty("socksProxyPort","80");
// props.setProperty("socksProxyVersion","5");
props.setProperty("mail.smtp.host", "smtp.gmail.com");
// ******************** FOR SSL ******************
//final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
//props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
//props.setProperty("mail.smtp.socketFactory.fallback", "false");
//props.setProperty("mail.smtp.port", "465");
//props.setProperty("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.debug", "true");
props.put("mail.store.protocol", "pop3");
props.put("mail.transport.protocol", "smtp");
final String username = "sender-username";
final String password = "sender-password";
Session session = Session.getDefaultInstance(props,
new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
// -- Create a new message --
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("[email protected]"));
msg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("[email protected]", false));
msg.setSubject("Hello");
msg.setSentDate(new Date());
// **************** Without Attachments ******************
msg.setText("How are you");
Transport.send(msg);
System.out.println("Message sent.");
}
}
回答by user3029106
I had the same problem as you described. In my case, replacing
我遇到了与您描述的相同的问题。就我而言，更换
Session session = Session.getDefaultInstance(props);
Session session = Session.getDefaultInstance(props);
with
和
Session session = Session.getInstance(props);
Session session = Session.getInstance(props);
did the trick. I hope it will be helpful.
成功了。我希望它会有所帮助。
回答by Dinum Dissanayaka
This work for me. Set the following tags. It will work.
这对我有用。设置以下标签。它会起作用。
props.put("mail.smtp.user","username");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "25");
props.put("mail.debug", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.smtp.EnableSSL.enable","true");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.setProperty("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.socketFactory.port", "465");
回答by Ajay Takur
mail.jar upto 1.4 v dont need props.put("mail.smtp.starttls.enable","true");later versions it is required to setup.
mail.jar up props.put("mail.smtp.starttls.enable","true");to 1.4 v 不需要更高版本，它需要设置。
