通过 Gmail 发送电子邮件时出错

Question

我在这里尝试使用 gmail 发送邮件，但出现以下错误

  javax.mail.AuthenticationFailedException: 534-5.7.14 
  <https://accounts.google.com/ContinueSignIn? 
  sarp=1&scc=1&plt=AKgnsbu7f
  534-5.7.14 Zt- 
  ibTxZf1iCvRrx_zqZ2e0gyU7UDBdKNf3Skj3y1daBQ4lwKDtlbWjuZVSBdqqJvWssPG
  534-5.7.14 
  axQ9afV4DYvgwRA6V94E2JKjGlqxgk8V7wxG9-lgPZoqbzI4rgBIk8SjDYwFt06r7tzWjs

  534-5.7.14 gn4zN1UWm-
 _BhrTGzjP02vV710gi2NHsgX7efxMTbZSowI02n1DL31Qhf_ba5vvtN8mSkI
  534-5.7.14 mutNhiGJSG0_sSI0ZAiblBGGfc1o> Please log in via your web browser and
  534-5.7.14 then try again.
  534-5.7.14  Learn more at
  534 5.7.14  https://support.google.com/mail/answer/78754     vy6sm35491986pac.38 - gsmtp

at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:648)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:583)
at javax.mail.Service.connect(Service.java:295)
at javax.mail.Service.connect(Service.java:176)

我已经在网络浏览器中成功登录，但在通过代码发送时出现错误。我还没有激活两步验证。我正在关注这些 link

Answer 1

JavaMail – 通过 TLS 的 GMail 使用 TLS 连接通过 Gmail SMTP 服务器发送电子邮件。

package com.mkyong.common;

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.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendMailTLS {

public static void main(String[] args) {

final String username = "username@gmail.com";
final String password = "password";

Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");

Session session = Session.getInstance(props,
  new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
  });

try {

    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress("from-email@gmail.com"));
    message.setRecipients(Message.RecipientType.TO,
        InternetAddress.parse("to-email@gmail.com"));
    message.setSubject("Testing Subject");
    message.setText("Dear Mail Crawler,"
        + "\n\n No spam to my email, please!");

    Transport.send(message);

    System.out.println("Done");

} catch (MessagingException e) {
    throw new RuntimeException(e);
}

} }

JavaMail – 通过 SSL 的 GMail 使用 SSL 连接通过 Gmail SMTP 服务器发送电子邮件。

package com.mkyong.common;

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.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendMailSSL {
public static void main(String[] args) {
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("username","password");
        }
    });

try {

    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress("from@no-spam.com"));
    message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("to@no-spam.com"));
    message.setSubject("Testing Subject");
    message.setText("Dear Mail Crawler," +
            "\n\n No spam to my email, please!");

    Transport.send(message);

    System.out.println("Done");

} catch (MessagingException e) {
    throw new RuntimeException(e);
}

} }

这是我的参考linkenter link and go reference website

Answer 2

通过网络浏览器登录 gmail，然后单击 Clik-this。select 开启 button.Once 您 select 您将能够发送邮件。

通过 Gmail 发送电子邮件时出错

Getting error while sending email through Gmail

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gmail-api