Java的SSL：无法找到请求的目标

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);} 

在发送邮件

javax.mail.MessagingException的我收到以下错误有效证书路径：异常读数响应;嵌套的例外是：javax.net.ssl.SSLHandshakeException：sun.security.validator.ValidatorException：PKIX路径建设失败：sun.security.provider.certpath.SunCertPathBuilderException：无法找到请求的目标的有效证书路径

Answer 1

尝试这个！

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");