Java Email SMTP & TSL, Erreur Impossible d'envoyer l'email

Question

J'ai un problème avec Java Email en utilisant SMTP & TSl, s'il vous plaît aidez-moi à résoudre ce problème. Je pense que le problème était le transport, mais je ne suis pas sûr. Ci-dessous sont mes extraits de code et d'erreur, s'il vous plaît aidez-moi à trouver mon erreur et la solution.

TSLEmail.class

import java.util.Properties; 
import javax.mail.Authenticator; 
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 

public class TSLEmail 
{ 
    public static void main(String[] args) 
    { 
     final String fromEmail = "mail@gmail.com"; //requires valid 
     gmail id 
     final String password = "mypass12"; // correct password for gmail id 
     final String toEmail = "recipients@gmail.com"; // can be any email id 

     System.out.println("TLSEmail Start"); 
     Properties props = new Properties(); 
     props.put("mail.smtp.host", "10.20.200.220"); //SMTP Host 
     props.put("mail.user", "user12"); 
    //props.put("mail.password", password); 
    props.put("mail.smtp.port", "587"); //TLS Port 
    props.put("mail.smtp.auth", "true"); //enable authentication 
    props.put("mail.smtp.starttls.enable", "true"); //enable STARTTLS 

    //create Authenticator object to pass in Session.getInstance argument 
    Authenticator auth = new Authenticator() { 
        //override the getPasswordAuthentication method 
        protected PasswordAuthentication 
     getPasswordAuthentication() { 
            return new 
     PasswordAuthentication(fromEmail, password); 
        } 
     }; 
     Session session = Session.getInstance(props, auth); 

     EmailUtil.sendEmail(session, toEmail,"TLSEmail Testing Subject", 
     "TLSEmail Testing Body"); 

    } 
    } 

EmailUtil.class

import java.util.Date; 
import javax.mail.Message; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 

public class EmailUtil 
{ 
    public static void sendEmail(Session session, String toEmail, String 
    subject, String body) 
    { 
     try 
     { 
     MimeMessage msg = new MimeMessage(session); 
     //set message headers 
     msg.addHeader("Content-type", "text/HTML; charset=UTF-8"); 
     msg.addHeader("format", "flowed"); 
     msg.addHeader("Content-Transfer-Encoding", "8bit"); 

     msg.setFrom(new InternetAddress("mail@gmail.com")); 

     msg.setReplyTo(InternetAddress.parse("recipients@gmail.com")); 

     msg.setSubject(subject, "UTF-8"); 

     msg.setText(body, "UTF-8"); 

     msg.setSentDate(new Date()); 

     msg.setRecipients(Message.RecipientType.TO, 
     InternetAddress.parse(toEmail, false)); 

     System.out.println("Message is ready"); 
     Transport.send(msg); 

     System.out.println("EMail Sent Successfully!!"); 
     } 
     catch (Exception e) { 
     e.printStackTrace(); 
     } 
    } 
    } 

Les résultats (erreur):

TLSEmail Start 
Message is ready 
javax.mail.MessagingException: Can't send command to SMTP host; 
    nested exception is: 
    javax.net.ssl.SSLHandshakeException: 
    sun.security.validator.ValidatorException: PKIX path building failed: 
    sun.security.provider.certpath.SunCertPathBuilderException: unable to 
find valid certification path to requested target 
    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1564) 
    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1551) 
    at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:935) 
    at 
    com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:426) 
    at javax.mail.Service.connect(Service.java:310) 
    at javax.mail.Service.connect(Service.java:169) 
    at javax.mail.Service.connect(Service.java:118) 
    at javax.mail.Transport.send0(Transport.java:188) 
    at javax.mail.Transport.send(Transport.java:118) 
    at com.bca.controller.EmailUtil.sendEmail(EmailUtil.java:35) 
    at com.bca.controller.TSLEmail.main(TSLEmail.java:34) 
Caused by: javax.net.ssl.SSLHandshakeException: 
sun.security.validator.ValidatorException: PKIX path building failed: 
sun.security.provider.certpath.SunCertPathBuilderException: unable to find 
valid certification path to requested target 
    at sun.security.ssl.Alerts.getSSLException(Unknown Source) 
    at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source) 
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source) 
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source) 
    at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source) 
    at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source) 
    at sun.security.ssl.Handshaker.processLoop(Unknown Source) 
    at sun.security.ssl.Handshaker.process_record(Unknown Source) 
    at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source) 
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown 
     Source) 
    at sun.security.ssl.SSLSocketImpl.writeRecord(Unknown Source) 
    at sun.security.ssl.AppOutputStream.write(Unknown Source) 
    at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:114) 
    at java.io.BufferedOutputStream.flushBuffer(Unknown Source) 
    at java.io.BufferedOutputStream.flush(Unknown Source) 
    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1562) 
     ... 10 more 
Caused by: sun.security.validator.ValidatorException: PKIX path building 
failed: sun.security.provider.certpath.SunCertPathBuilderException: unable 
to find valid certification path to requested target 
    at sun.security.validator.PKIXValidator.doBuild(Unknown Source) 
    at sun.security.validator.PKIXValidator.engineValidate(Unknown Source) 
    at sun.security.validator.Validator.validate(Unknown Source) 
    at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source) 
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source) 
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown 
     Source) 
     ... 22 more 
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: 
unable to find valid certification path to requested target 
    at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown 
     Source) 
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown 
     Source) 
    at java.security.cert.CertPathBuilder.build(Unknown Source) 
     ... 28 more 

S'il vous plaît aidez-moi à trouver une solution simple et sûr pour mon problème. Merci Vous

Answer 1

Ajouter cette propriété aussi. Cela a fonctionné pour moi.

props.put("mail.smtp.ssl.trust", Smtp_host);