Java SSL：无法找到请求目标的有效证书路径[重复]

Question

String to="mydaman7291@gmail.com";//change accordingly

//Get the session object
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 sess = Session.getInstance(props,
 new javax.mail.Authenticator() {
 protected PasswordAuthentication getPasswordAuthentication() {
 return new PasswordAuthentication("daman.bonnie07@gmail.com","password");//change accordingly
 }
});

//compose message
try {
 MimeMessage message = new MimeMessage(sess);
 message.setFrom(new InternetAddress("daman.bonnie07@gmail.com"));//change accordingly
 message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
 message.setSubject("Hello");
 message.setText("Testing.......");

 //send message
 Transport.send(message);

 System.out.println("message sent successfully");

} 
catch (MessagingException e) {
    out.println(e);}

发送邮件时出现以下错误

javax.mail.MessagingException：异常读取响应；嵌套异常是：javax.net.ssl.SSLHandshakeException：sun.security.validator.ValidatorException：PKIX 路径构建失败：sun.security.provider.certpath.SunCertPathBuilderException：无法找到请求目标的有效证书路径

Answer 1

试试这个！

Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.xyz.in");
    props.put("mail.smtp.socketFactory.port", "25");

    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.port", "25");
    props.put("mail.smtp.dsn.notify",
              "SUCCESS ORCPT=rfc822;");
    props.put("mail.smtp.dsn.ret", "FULL");