嵌套异常是：javax.mail.MessagingException：无法连接到 SMTP 主机：smtp.bizm ail.yahoo.com，端口：465

Question

我无法连接到使用 SSL 身份验证的 smtp 端口号 465。早些时候，它曾经在默认端口 25 中工作，但已将所有出站电子邮件的出站电子邮件设置更改为指向 465。当我使用 Outlook 时，这工作得很好，但显示它无法连接到端口 465。 以下是错误。

javax.mail.SendFailedException: Sending failed;
nested exception is:
    javax.mail.MessagingException: Could not connect to SMTP host: smtp.bizmail.yahoo.com, port: 465
    at javax.mail.Transport.send0(Transport.java:218)
    at javax.mail.Transport.send(Transport.java:80)

下面是我使用的 Javax Mail 设置。

Properties props = System.getProperties(); 
props.put("mail.smtp.host", host);
props.put("mail.smtp.socketFactory.class", 
props.setProperty("mail.smtp.port", "465");
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.server.username", "test@yahoo.com");
props.put("mail.server.password", "test123");
props.put("mail.smtp.auth", "true");
props.setProperty("mail.smtp.submitter",authenticator.getPasswordAuthentication().getUserName()); 
Session session = Session.getInstance(props, authenticator);
session.setDebug(sessionDebug);`

Answer 1

public static void sendEmail(String emailMessage){

    try{

        final String fromEmail = "*****@yahoo.com";      
        final String password = "*****";                    
        final String toEmail = "*****@yahoo.com";        // can be any email id 
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.mail.yahoo.com"); //SMTP Host


        props.put("mail.smtp.port", "465");                 //TLS Port 465
        props.put("mail.smtp.auth", "true");                //enable authentication
        props.put("mail.smtp.starttls.enable", "true");     //enable STARTTLS
        props.put("mail.smtp.ssl.enable", "true");          // enable ssl



        Authenticator auth = new Authenticator() {


            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(fromEmail, password);
            }
        };
        Session session = Session.getInstance(props, auth);

        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(fromEmail));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmail));



        message.setSubject("Email From Yahoo JavaMail API");
        message.setText(emailMessage);


        Transport.send(message);
        System.out.println("Email successfully Sent");
    }catch(Exception ex){
        System.out.println(ex);
    }
}

试试这个