无法通过 java 邮件 API 发送电子邮件？

Question

我想从我的 java(JSP) 项目（基本上是一个基于 Web 的项目）向用户发送邮件。 但我遇到了一个错误。给我解决方案。

我尝试了很多网上提供的解决方案，但没有任何解决办法。 我将端口号 465 更改为 587，但我的错误仍然存​​在。

import java.io.UnsupportedEncodingException;  
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
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.InternetAddress;
import javax.mail.internet.MimeMessage;  

public class MailUtil {    
    private String from1 = "fromemail@gmail.com";  
    private String  password= "*****";  
    private String FROM_NAME = "abc";  

    public boolean sendMail(String[] recipients, String[] bccRecipients, String subject, String message) {  
        try {  
            Properties props = new Properties(); 
            props.put("mail.smtp.starttls.enable", "true");
            props.put("mail.smtp.host", "smtp.gmail.com");  
            props.put("mail.smtp.auth", "true");
           // props.put("mail.smtp.socketFactory.port", "465"); 
            props.put("mail.smtp.port", "587");
       props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
            props.put("mail.debug", "false");  
            props.put("mail.smtp.ssl.enable", "true");  

            Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(from1, password);
                }
            });  
            Message msg = new MimeMessage(session);  

            InternetAddress from = new InternetAddress(from, name);  
            msg.setFrom(from);  

            InternetAddress[] toAddresses = new InternetAddress[recipients.length];  
            for (int i = 0; i < recipients.length; i++) {  
                toAddresses[i] = new InternetAddress(recipients[i]);  
            }  
            msg.setRecipients(Message.RecipientType.TO, toAddresses);  


            InternetAddress[] bccAddresses = new InternetAddress[bccRecipients.length];  
            for (int j = 0; j < bccRecipients.length; j++) {  
                bccAddresses[j] = new InternetAddress(bccRecipients[j]);  
            }  
            msg.setRecipients(Message.RecipientType.BCC, bccAddresses);  

            msg.setSubject(subject);  
            msg.setContent(message, "text/plain");  
            Transport.send(msg);  
            return true;  
        } catch (UnsupportedEncodingException ex) {  
            Logger.getLogger(MailUtil.class.getName()).log(Level.SEVERE, null, ex);  
            return false;  

        } catch (MessagingException ex) {  
            Logger.getLogger(MailUtil.class.getName()).log(Level.SEVERE, null, ex);  
            return false;  
        }  
    }  
}

严重：无

javax.mail.SendFailedException：发送失败； 嵌套异常是： class javax.mail.MessagingException: 530 5.7.0 必须先发出 STARTTLS 命令。 d129sm8507654pfa.142 - gsmtp

at javax.mail.Transport.send0(Transport.java:218)
at javax.mail.Transport.send(Transport.java:80)

Answer 1

首先，修复所有这些common JavaMail mistakes。

如果这不能解决问题，请发布JavaMail debug output。