Problems implementing an email sending method

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Problems implementing an email sending method

Asked 8 years, 3 months ago

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import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;
import javax.activation.*;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import org.apache.commons.mail.Email;
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author OctavioCesar
 */
public class SendEmailJava {

    public static void main(String args[]) {

        sendemail();
    }

 public static void sendemail() {
        SimpleEmail email = new SimpleEmail();

        email.setHostName("smtp.gmail.com");
        email.setSSLOnConnect(true);
        email.setSmtpPort(465);
        email.setAuthenticator(new DefaultAuthenticator("[email protected]", "exemplo_senha"));

        try {
            email.setFrom("[email protected]");

            email.setDebug(true);

            email.setSubject("Assunto do E-mail");
            email.setMsg("Texto sem formatação");
            email.addTo("[email protected]");

            email.send();

        } catch (EmailException e) {
            e.printStackTrace();
        }

    }

}

I’m having trouble getting it working from the following error on the console

DEBUG: JavaMail version 1.4.7
DEBUG: URL jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/gimap.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/gimap.jar!/META-INF/javamail.providers
DEBUG: URL jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/imap.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/imap.jar!/META-INF/javamail.providers
DEBUG: URL jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/pop3.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/pop3.jar!/META-INF/javamail.providers
DEBUG: URL jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/smtp.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/smtp.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.gimap.GmailSSLStore=javax.mail.Provider[STORE,gimaps,com.sun.mail.gimap.GmailSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.gimap.GmailStore=javax.mail.Provider[STORE,gimap,com.sun.mail.gimap.GmailStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], gimap=javax.mail.Provider[STORE,gimap,com.sun.mail.gimap.GmailStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], gimaps=javax.mail.Provider[STORE,gimaps,com.sun.mail.gimap.GmailSSLStore,Oracle]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: URL jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/smtp.jar!/META-INF/javamail.address.map
DEBUG: successfully loaded resource: jar:file:/D:/Projectos%20JOB%20UEM/JavaMail/javamail1_4_7/javamail-1.4.7/lib/smtp.jar!/META-INF/javamail.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 465, isSSL false
org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.gmail.com:465
    at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1421)
    at org.apache.commons.mail.Email.send(Email.java:1448)
    at SendEmailJava.sendemail(SendEmailJava.java:54)
    at SendEmailJava.main(SendEmailJava.java:32)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
  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.openServer(SMTPTransport.java:1961)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
    at javax.mail.Service.connect(Service.java:317)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at javax.mail.Transport.send0(Transport.java:194)
    at javax.mail.Transport.send(Transport.java:124)
    at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1411)
    ... 3 more
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(Alerts.java:192)
    at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1884)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
    at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
    at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
    at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)
    at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:354)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:211)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)
    ... 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(PKIXValidator.java:385)
    at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
    at sun.security.validator.Validator.validate(Validator.java:260)
    at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)
    ... 21 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
    at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
    ... 27 more

1

Octavio, your question is probably being negative because of Stacktrace in an image. Try to copy and place Stacktrace.

– Rubico

2016/04/05 at 15:03
Octavio is welcome to sopt. First of all, it is important that you elaborate a question that contains an objective title and some information you need so you can get help more easily. Always try to add information in the body of the question related to the problem. A tip is to always add the code and answer the following questions: 1) what have I done? ; 2) What am I trying to do? ; 3) What problems am I facing?. With this basic answer, your question already has a basis for getting answers :)

– user28595

2016/04/05 at 15:12

1 answer

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by Anthony Accioly • **20,516** points · Answer 1 · 2016-04-05T15:32:54+00:00

You are asking the email client to use SSL:

email.setSSLOnConnect(true);

This requires your application to trust and validate the public certificate used by the smtp server.

You can find a guide on how to download the public certificate and import with the keytool in that article (in English)

Getting the certificate (on Linux with Openssl):

openssl s_client -connect smtp.gmail.com:465

Importing the certificate into the standard Keystore (Linux):

sudo keytool -import -alias smtp.gmail.com -keystore $JAVA_HOME/jre/lib/security/cacerts -file gmail.cert