Java Database Connectivity (JDBC)

enabling the debug mode on the mail session may help you.

...

Session session = Session.getInstance(props,

new javax.mail.Authenticator() {

protected PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(username, password);

}

});

try {

session.setDebug(true);

Message message = new MimeMessage(session);

...

I want to send email using gmail SMTP. I got the following code from internet but I am getting following run-time error.
Kindly guide:
<
Exception in thread "main" java.lang.RuntimeException: javax.mail.NoSuchProviderException: smtp
 . . .
at SendMailTLS2.main(SendMailTLS2.java:41)
>

Well YOU are the ONLY one that knows what line in your code is line 41. As you can see above that is the line that caused the exception.

And this in your code says you really do NOT care what exceptions get raised or what causes them.

} catch (MessagingException e) {
throw new RuntimeException(e);
}

Why do you 'catch' an exception and then totally hide what it is telling you?

Don't catch exceptions unless you plan to handle them. Adding that code just hides the REAL exception info you were given.

Remove that junk from your code and don't put it back.

Then rerun the code and SHOW US:

1. WHAT you do

2. HOW you do it

3. WHAT results you get

That includes posting a copy of the execution that includes the FULL exception and message you get.

But a missing provider message likely means you are missing a jar file that is needed.

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 java.util.Properties;

public class Test
{
  public static void main(String[] args)
  {

      final String username = "***@gmail.com";

      final String password = "&&";

      Properties props = new Properties();

      props.put("mail.smtp.auth", "true");

      props.put("mail.smtp.starttls.enable", "true");

      props.put("mail.smtp.host", "smtp.gmail.com");

      props.put("mail.smtp.port", "587");

      try
      {

        Session session = Session.getInstance(props,

                                              new javax.mail.Authenticator()
                                              {
                                                  protected PasswordAuthentication getPasswordAuthentication()
                                                  {
                                                    return new PasswordAuthentication(username, password);
                                                  }
                                              });

        session.setDebug(true);
       
        Message message = new MimeMessage(session);

        message.setFrom(new InternetAddress("**@gmail.com"));
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("aa@yahoo.com"));

        message.setSubject("Testing Subject");

        message.setText("Dear Mail Crawler,\n\n No spam to my email, please!");

        Transport.send(message);

        System.out.println("Done");
      }
      catch (javax.mail.MessagingException e)
      {
        e.printStackTrace();
      }
  }
}

I ran it using the windows command line - just to make sure the IDE does not add anything to the classpath.

D:\projects\otn\bin>java -classpath .;d:\lib\mail-lib\mail.jar Test

The top part of the output ...

DEBUG: setDebug: JavaMail version 1.3 (my version of mail.jar is old)
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true

DEBUG: SMTPTransport trying to connect to host "smtp.gmail.com", port 587

Do you see something like the above? Please post your trace.

Hi,

Thanks everybody for kindly concentrating on my problem. God bless you people.

I have done the following as requested:

• Remove that junk from your code and don't put it back.

Yes

• But a missing provider message likely means you are missing a jar file that is needed.

I have provided the value of CLASSPATH by displaying the variable

• That includes posting a copy of the execution that includes the FULL exception and message you get.

Yes I have posted the full message

• session.setDebug(true);

Yes I did this

• Well YOU are the ONLY one that knows what line in your code is line 41. As you can see above that is the line that caused the exception.

I have put the line numbers in the code.

MY code with line numbers is:

1/* after removing the try catch block */

2import java.util.Properties;

3

4import javax.mail.Message;

5import javax.mail.MessagingException;

6import javax.mail.PasswordAuthentication;

7import javax.mail.Session;

8import javax.mail.Transport;

9import javax.mail.internet.InternetAddress;

10import javax.mail.internet.MimeMessage;

11

12public class SendMailTLS3 {

13

14 public static void main(String[] args) {

15

16 final String username = "***@gmail.com";

17 final String password = "*****";

18  

19 Properties props = new Properties();

20 props.put("mail.smtp.auth", "true");

21 props.put("mail.smtp.starttls.enable", "true");

22 props.put("mail.smtp.host", "smtp.gmail.com");

23 props.put("mail.smtp.port", "587");

24               

25 Session session = Session.getInstance(props,

26  new javax.mail.Authenticator() {

27 protected PasswordAuthentication getPasswordAuthentication() {

28 return new PasswordAuthentication(username, password);

29 }

30  });

31                 session.setDebug(true);

32

33                try{

34 Message message = new MimeMessage(session);

35 message.setFrom(new InternetAddress("***@gmail.com"));

36 message.setRecipients(Message.RecipientType.TO,

37 InternetAddress.parse("***@yahoo.com"));

38 message.setSubject("Testing Subject");

39 message.setText("Dear Mail Crawler,"

40 + "\n\n No spam to my email, please!");

41

41 Transport.send(message);

42

42 System.out.println("Done");

  43              }catch (MessagingException e) {

44 //throw new RuntimeException(e);

45                       e.printStackTrace();

46 }

47

48

49 }

50}

=====

Compilation & output of code.

D:\java prog\2017Self\email>javac SendMailTLS3.java

D:\java prog\2017Self\email>java SendMailTLS3

DEBUG: setDebug: JavaMail version 1.4.7

DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc.,1.4.7]

DEBUG: Exception loading provider, THROW:

java.lang.ClassNotFoundException: com.sun.mail.smtp.SMTPTransport

        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:264)

        at javax.mail.Session.getService(Session.java:788)

        at javax.mail.Session.getTransport(Session.java:728)

        at javax.mail.Session.getTransport(Session.java:668)

        at javax.mail.Session.getTransport(Session.java:648)

        at javax.mail.Session.getTransport(Session.java:705)

        at javax.mail.Transport.send0(Transport.java:192)

        at javax.mail.Transport.send(Transport.java:124)

        at SendMailTLS3.main(SendMailTLS3.java:42)

javax.mail.NoSuchProviderException: smtp

        at javax.mail.Session.getService(Session.java:792)

        at javax.mail.Session.getTransport(Session.java:728)

        at javax.mail.Session.getTransport(Session.java:668)

        at javax.mail.Session.getTransport(Session.java:648)

        at javax.mail.Session.getTransport(Session.java:705)

        at javax.mail.Transport.send0(Transport.java:192)

        at javax.mail.Transport.send(Transport.java:124)

        at SendMailTLS3.main(SendMailTLS3.java:42)

D:\>

D:\>echo %CLASSPATH%

D:\download\mysql-connector-java-5.0.8-bin.jar;D:\download\jxl.jar;D:\download\javamail-1.4.7\lib\mailapi.jar;.

D:\>

D:\>echo %CLASSPATH%

D:\download\mysql-connector-java-5.0.8-bin.jar;D:\download\jxl.jar;D:\download\javamail-1.4.7\lib\mailapi.jar;.

D:\>

Somebody please guide me.

Zulfi.

java.lang.ClassNotFoundException: com.sun.mail.smtp.SMTPTransport

Your classpath does not have com.sun.mail.smtp.SMTPTransport class available to load hence the java.lang.ClassNotFoundException.

Edit:

First, download the mail-1.4.7.jar from  https://mvnrepository.com/artifact/javax.mail/mail/1.4.7 and add to your classpath.

Then if you need, download smtp.jar from https://mvnrepository.com/artifact/com.sun.mail/smtp/1.4.5

I think you will also need further libraries  - activation.jar.

Hi,

I have included SMTP.jar in my CLASSPATH but i am now getting following error:

D:\l>javac SendMailTLS3.java

D:\java prog\2017Self\email>java SendMailTLS3

DEBUG: setDebug: JavaMail version 1.4.7

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 587, isSSL false

220 smtp.gmail.com ESMTP p83sm6345650wmf.38 - gsmtp

DEBUG SMTP: connected to host "smtp.gmail.com", port: 587

EHLO HP-PC

250-smtp.gmail.com at your service, [119.157.246.113]

250-SIZE 35882577

250-8BITMIME

250-STARTTLS

250-ENHANCEDSTATUSCODES

250-PIPELINING

250 SMTPUTF8

DEBUG SMTP: Found extension "SIZE", arg "35882577"

DEBUG SMTP: Found extension "8BITMIME", arg ""

DEBUG SMTP: Found extension "STARTTLS", arg ""

DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""

DEBUG SMTP: Found extension "PIPELINING", arg ""

DEBUG SMTP: Found extension "SMTPUTF8", arg ""

STARTTLS

220 2.0.0 Ready to start TLS

javax.mail.MessagingException: Could not convert socket to TLS;

  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.startTLS(SMTPTransport.java:1907)

        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:666)

        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 SendMailTLS3.main(SendMailTLS3.java:42)

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:1937)

        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)

        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)

        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1478)

        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212)

        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)

        at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)

        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1050)

        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1363)

        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1391)

        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1375)

        at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549)

        at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:486)

        at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1902)

        ... 7 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:387)

        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:324)

        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)

        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)

        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1460)

        ... 17 more

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

        at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)

        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)

        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)

        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)

        ... 23 more

D:\>cd D:\download\javamail-1.4.7\lib

Kindly tell me what other jar files do i have to include in the CLASSPATH???

Following is the directory of jar files:

D:\>dir

Volume in drive D has no label.

Volume Serial Number is B269-AF38

Directory of D:\download\javamail-1.4.7\lib

03/06/2013  04:19 PM    <DIR>          .

03/06/2013  04:19 PM    <DIR>          ..

03/06/2013  04:18 PM            19,171 dsn.jar

03/06/2013  04:17 PM            14,769 gimap.jar

03/06/2013  04:17 PM           181,492 imap.jar

03/06/2013  04:16 PM           279,893 mailapi.jar

03/06/2013  04:17 PM            44,405 pop3.jar

03/06/2013  04:17 PM            52,869 smtp.jar

               6 File(s)        592,599 bytes

               2 Dir(s)  565,493,882,880 bytes free

D:\>

Some body please guide me.

Zulfi.

check the link

https://stackoverflow.com/questions/1990454/using-javamail-to-connect-to-gmail-smtp-server-ignores-specified-port-and-tr…

Your code needs to be adjusted

Copy + Paste:

Transport transport = session.getTransport("smtps");
transport.connect (smtp_host, smtp_port, smtp_username, smtp_password);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();

First, change your code to look like ...

Transport tr = session.getTransport("smtps");
    tr.send(message);

and test.

I was able to connect using your code with just the changes in reply #8.

Transport tr = session.getTransport("smtps");
    tr.send(message);

output:

Subject: Testing Subject
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Dear Mail Crawler,
 No spam to my email, please!
.
250 2.0.0 OK 1502393442 x53sm3929839edd.79 - gsmtp
QUIT
221 2.0.0 closing connection x53sm3929839edd.79 - gsmtp
Done

Glad, you were able to figure it out yourself. Just to remind you, the code you posted contains your password.

Thanks for your help. I would take necessary action.

Zulfi.

Please make sure to change that password immediately if you haven't done so yet.

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