我得到530 5.7.0必须先发出一个STARTTLS命令。a5sm29349940pbw。4 - gsmtp错误发送邮件从java程序，如何解决它?

Error:

com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. a5sm29349940pbw.4 - gsmtp

at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1829)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1368)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:886)
at javax.mail.Transport.send0(Transport.java:191)
at javax.mail.Transport.send(Transport.java:120)
at com.conceptbuild.EmailGenerator.main(EmailGenerator.java:120)

Code:

package com.conceptbuild;

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
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;
import javax.mail.internet.MimeMessage.RecipientType;

public class EmailGenerator {

    public EmailGenerator() {
        // TODO Auto-generated constructor stub
    }

    private class MailAuthenticator extends Authenticator {

        String username = "username";

        String password = "password";

        public MailAuthenticator() {
            // TODO Auto-generated constructor stub
        }

        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }

    }

    public static void main(String[] args)   {

        String host="smtp.gmail.com";
        String from="fromaddress";
        String to="toaddress";
        String cc="ccaddress";
        Address fromaddress=null,toaddress=null,ccaddress=null;

        Properties mailproperties= new Properties();

        mailproperties.put("mail.smtp.host", host);
        mailproperties.put("mail.smtp.port", 25);
        mailproperties.put("mail.debug", "true");
        mailproperties.put("mail.transport.protocal", "smtps");
        mailproperties.put("mail.smtp.STARTTLS.enable", "true");
        mailproperties.put("mail.smtp.auth", "true");
        mailproperties.put("mail.smtps.**ssl.enable", "false");
        mailproperties.setProperty("mail.smtps.**ssl.required", "false");

        EmailGenerator emailgenerator= new EmailGenerator();

        MailAuthenticator auth= emailgenerator.new MailAuthenticator();

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

        try {
             fromaddress= new InternetAddress(from,"Sushant Wadjikar");
             toaddress= new InternetAddress(to);
             ccaddress=new InternetAddress(cc);

        }catch (AddressException ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        } catch (UnsupportedEncodingException ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        }

        Message message= new MimeMessage(session);

        try {
            message.setFrom(fromaddress);
            message.setRecipient(RecipientType.TO, toaddress);
            message.setRecipient(RecipientType.CC, ccaddress);
            message.setSubject("Hello !!! My First Mail from my java program");
            message.setSentDate(new Date());
            message.setText("Good Morning"+"\n"+"This is my first mail, sending it from my java program"+"\n"+"Thanks and Regards"+"\n"+"Sushant");

            Transport transport;
            transport = session.getTransport("smtp");

            transport.connect();

            message.saveChanges();

            transport.send(message);

            System.out.println("Mail send successfully.........");

        } catch (MessagingException ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        }
    }
}

1 个解决方案

#1

This will likely fix your problem.

这可能会解决你的问题。

Also, make up your mind on whether you're using the "smtp" protocol or the "smtps" protocol and name the properties accordingly. And there are no properties with "**" in their names.

此外，还可以决定是否使用“smtp”协议或“smtps”协议，并相应地命名属性。而且它们的名称中没有“**”属性。

#1