could not connect to smtp host:smtp.gmail.com, port:465

Question

could not connect to smtp host:smtp.gmail.com, port:465 i have searched a lot and changed the port many time but same error appear each time like port 567, 25 and so on but no use ... Thank you in advance
UserPage.java is

   package com.example.androidphp;

   import android.support.v7.app.ActionBarActivity;

   import android.annotation.SuppressLint;

   import android.annotation.TargetApi;

   import android.os.Build;

   import android.os.Bundle;

   import android.os.StrictMode;

   import android.util.Log;

   import android.view.MenuItem;

   import android.view.View;

   import android.widget.Button;

   import android.widget.TextView;


  public class UserPage extends ActionBarActivity {

  Button button;

  TextView txtvw;

  String text;

 @TargetApi(Build.VERSION_CODES.GINGERBREAD)

 @SuppressLint("NewApi")

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.userpage);

    txtvw = (TextView)findViewById(R.id.TextView01);

    button =(Button) findViewById(R.id.save);

    text = "";

    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();

    StrictMode.setThreadPolicy(policy);

    button.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

             try {   

                 System.out.println("in try");

                   GmailSender sender = new GmailSender("sidzyum@gmail.com", "yum12345");

                     sender.sendMail("This is Subject",   

                         "This is Body",   

                            "sidzyum@gmail.com",   

                            "sadiaasgharnov@gmail.com");  

                         System.out.println("after mail send ");

                    } catch (Exception e) {   

               Log.e("SendMail", e.getMessage(), e); 

                   e.printStackTrace();

                }

        }

     });

   }


@Override

public boolean onOptionsItemSelected(MenuItem item) {

    // Handle action bar item clicks here. The action bar will

    // automatically handle clicks on the Home/Up button, so long

    // as you specify a parent activity in AndroidManifest.xml.

    int id = item.getItemId();

    if (id == R.id.action_settings) {

        return true;

    }

    return super.onOptionsItemSelected(item);

}

 }

and GmailSender.java is

   package com.example.androidphp;

   import javax.activation.DataHandler;   

   import javax.activation.DataSource;   

   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.io.ByteArrayInputStream;   

   import java.io.IOException;   

   import java.io.InputStream;   

   import java.io.OutputStream;   

   import java.security.Security;   

   import java.util.Properties;   

  public class GmailSender extends javax.mail.Authenticator {   

   private String mailhost = "smtp.gmail.com";   

   private String user;   

   private String password;   

   private Session session;   

   static {   

    Security.addProvider(new com.example.androidphp.JSSEProvider());   

 }  

public GmailSender(String user, String password) {   

    this.user = user;   

    this.password = password;   

    Properties props = new Properties();   

    props.setProperty("mail.transport.protocol", "smtp");   

    props.setProperty("mail.host", mailhost);   

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

    props.put("mail.smtp.port", "25");   

    props.put("mail.smtp.socketFactory.port", "25");   

    props.put("mail.smtp.socketFactory.class",   

            "javax.net.ssl.SSLSocketFactory");   

    props.put("mail.smtp.socketFactory.fallback", "false");   

    props.setProperty("mail.smtp.quitwait", "false");   

    session = Session.getDefaultInstance(props, this);   

}   

protected PasswordAuthentication getPasswordAuthentication() {   

    return new PasswordAuthentication(user, password);   

}   

public synchronized void sendMail(String subject, String body, String sender, String recipients) 

throws Exception {   

    MimeMessage message = new MimeMessage(session);   

    DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), 

    "text/plain"));   

    message.setSender(new InternetAddress(sender));   

    message.setSubject(subject);   

    message.setDataHandler(handler);   

    if (recipients.indexOf(',') > 0)   

        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));   

    else  

        message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));   

    Transport.send(message);   

}   

public class ByteArrayDataSource implements DataSource {   

    private byte[] data;   

    private String type;   

    public ByteArrayDataSource(byte[] data, String type) {   

        super();   

        this.data = data;   

        this.type = type;   

    }   

    public ByteArrayDataSource(byte[] data) {   

        super();   

        this.data = data;   

    }   

    public void setType(String type) {   

        this.type = type;   

    }   

    public String getContentType() {   

        if (type == null)   

            return "application/octet-stream";   

        else  

            return type;   

    }   


    public InputStream getInputStream() throws IOException {   

        return new ByteArrayInputStream(data);   

    }   

    public String getName() {   

        return "ByteArrayDataSource";   

    }   

    public OutputStream getOutputStream() throws IOException {   

        throw new IOException("Not Supported");   

    }   

  }   

 }  

and JSSEProvider is

  package com.example.androidphp;

 import java.security.Provider;


 import java.security.AccessController;

 public class JSSEProvider extends Provider {

     /**

     * 

     */

  private static final long serialVersionUID = 1L;

   public JSSEProvider() {

        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");

        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {

            public Void run() {

                put("SSLContext.TLS",

                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");

                put("Alg.Alias.SSLContext.TLSv1", "TLS");

                put("KeyManagerFactory.X509",

                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");

                put("TrustManagerFactory.X509",

                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");

                return null;

            }

        });

     }

  }

Answer 1

Are you telling it to use ssl?

Add this line:

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

in your GmailSender constructor.

Answer 2

keep the port no: as 465.... try changing the session value as

session = Session.getInstance(props, new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(user, password);
    }
}); 

also change the security settings of less secure apps in your account by clicking the link below: https://www.google.com/settings/security/lesssecureapps

Answer 3

Turn off antivirus or add an exception. Worked for me. And use application specific password if its gmail