如何从自定义gmail域发送邮件?

时间:2018-10-29 10:18:29

标签: java email smtp gmail

我正在创建一个应用程序,需要从自定义gmail域发送电子邮件。 这是我的相同代码。

import java.time.LocalDateTime;
import java.util.Properties;
import java.util.Random;

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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

public class OTPMail {

     static char[] OTP(int len) 
        { 
            System.out.println("Generating OTP using random() : "); 
            // Using numeric values 
            String numbers = "0123456789"; 
            // Using random method 
            Random rndm_method = new Random(); 
            char[] otp = new char[len]; 
            for (int i = 0; i < len; i++) 
            { 
                // Use of charAt() method : to get character value 
                // Use of nextInt() as it is scanning the value as int 
                otp[i] = 
                 numbers.charAt(rndm_method.nextInt(numbers.length())); 
            } 
            return otp; 
        } 
        public static void main(String[] args) 
        { 
            int length = 4; 
            char[] OTP = OTP(length);
            System.out.print("Generated OTP is: ");
            System.out.println(OTP);
            String OTPString = String.valueOf(OTP);
            //send an email
            String messageForMail = "Your OTP for <company name>is: " + OTPString;

            //update admin mail and password here 


            final String username = "shop@<ownDomain>.com";
            final String password = "<passowrd>";

            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("Kisna"));

                //update recipient mail id here.
                message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("<mailId>@gmail.com"));
                message.setSubject("OTP");
                message.setText(messageForMail);

                Transport.send(message);

                System.out.println("OTP sent to mail");
                //check the time when mail is sent

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

        } 

}

它给了我这样的错误:

  

线程“ main”中的异常java.lang.RuntimeException:   javax.mail.AuthenticationFailedException:534-5.7.14    请   通过534-5.7.14登录您的网络浏览器,然后重试。 534-5.7.14   了解更多信息,在534 5.7.14 https://support.google.com/mail/answer/78754   80-v6sm5667641ywh.55-gsmtp

     

在OTPMail.main(OTPMail.java:81)的原因:   javax.mail.AuthenticationFailedException:534-5.7.14    请   通过534-5.7.14登录您的网络浏览器,然后重试。 534-5.7.14   了解更多信息,在534 5.7.14 https://support.google.com/mail/answer/78754   80-v6sm5667641ywh.55-gsmtp

     在

  com.sun.mail.smtp.SMTPTransport $ Authenticator.authenticate(SMTPTransport.java:826)     在   com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:761)     在   com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685)     在javax.mail.Service.connect(Service.java:317)在   javax.mail.Service.connect(Service.java:176)在   javax.mail.Service.connect(Service.java:125)在   javax.mail.Transport.send0(Transport.java:194)在   javax.mail.Transport.send(Transport.java:124)在   OTPMail.main(OTPMail.java:75)

当我对“ xxx@gmail.com”邮件使用相同的代码时,它可以正常工作。 但是,当我将自定义域设置为“ xxx@ownDomain.com”时,它给了我提到的错误。关于如何解决该问题的任何想法吗?

1 个答案:

答案 0 :(得分:0)

要使用Java Mail发送电子邮件,您需要让安全程度较低的应用访问您的帐户。 转到 Google帐户->登录和安全页面,然后选中允许安全程度较低的应用,然后重试。

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