Send email using java

Question

I m trying to send an email using Java   import java util    import javax mail    import javax mail internet    import javax activation     public class SendEmail       public static void main String    args              Recipient s email ID needs to be mentioned        String to    abcd gmail com             Sender s email ID needs to be mentioned       String from    web gmail com             Assuming you are sending email from localhost       String host    localhost             Get system properties       Properties properties   System getProperties              Setup mail server       properties setProperty  mail smtp host   host             Get the default Session object        Session session   Session getDefaultInstance properties          try              Create a default MimeMessage object           MimeMessage message   new MimeMessage session                Set From  header field of the header           message setFrom new InternetAddress from                 Set To  header field of the header           message addRecipient Message RecipientType TO                                    new InternetAddress to                 Set Subject  header field          message setSubject  This is the Subject Line                  Now set the actual message          message setText  This is actual message                 Send message          Transport send message            System out println  Sent message successfully               catch  MessagingException mex             mex printStackTrace                     I am getting the error    javax mail MessagingException  Could not connect to SMTP host  localhost  port  25    nested exception is java net ConnectException  Connection refused  connect         at com sun mail smtp SMTPTransport openServer SMTPTransport java 1706          at com sun mail smtp SMTPTransport protocolConnect SMTPTransport java 525    Will this code work to send email

User · Answer

You can find a complete and very simple java class for sending emails using Google(gmail) account here,

Send email using java and Google account

It uses following properties

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");

User · Answer

You need a SMTP server for sending mails  There are servers you can install locally on your own pc  or you can use one of the many online servers  One of the more known servers is Google s   I just successfully tested the allowed Google SMTP configurations using the first example from Simple Java Mail       final Email email   EmailBuilder startingBlank            from  lollypop    lol pop somemail com            to  C Cane    candycane candyshop org            withPlainText  We should meet up             withHTMLText   lt b gt We should meet up  lt  b gt             withSubject  hey            starting 5 0 0 do the following using the MailerBuilder instead        new Mailer  smtp gmail com   25   your user    your password   TransportStrategy SMTP TLS  sendMail email       new Mailer  smtp gmail com   587   your user    your password   TransportStrategy SMTP TLS  sendMail email       new Mailer  smtp gmail com   465   your user    your password   TransportStrategy SMTP SSL  sendMail email     Notice the various ports and transport strategies  which handle all the necessary properties for you    Curiously  Google require TLS on port 25 as well  even though Google s instructions say otherwise

User · Answer

import java util Date  import java util Properties   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    public class SendEmail extends Object   public static void main String    args         try           Properties props   new Properties            props put  mail smtp host    smtp mail yahoo com       for gmail use smtp gmail com         props put  mail smtp auth    true            props put  mail debug    true             props put  mail smtp starttls enable    true            props put  mail smtp port    465            props put  mail smtp socketFactory port    465            props put  mail smtp socketFactory class    javax net ssl SSLSocketFactory            props put  mail smtp socketFactory fallback    false             Session mailSession   Session getInstance props  new javax mail Authenticator                  protected PasswordAuthentication getPasswordAuthentication                     return new PasswordAuthentication  username yahoo com    password                                       mailSession setDebug true      Enable the debug mode          Message msg   new MimeMessage  mailSession               --  Set the FROM  TO  DATE and SUBJECT fields         msg setFrom  new InternetAddress   fromusername yahoo com               msg setRecipients  Message RecipientType TO InternetAddress parse  tousername gmail com              msg setSentDate  new Date             msg setSubject   Hello World                 --  Create the body of the mail         msg setText   Hello from my first e-mail sent with JavaMail                --  Ask the Transport class to send our mail message         Transport send  msg          catch Exception E           System out println   Oops something has gone pearshaped             System out println  E                Required jar files   mail jar activation jar additionnal jar   Click here - How to add External Jars

User · Answer

Try this out  it works well for me  Make sure that before send email u need to give the access for less secure app in your gmail account  So go to the following link and try out with this java code  Activate gmail for less secure app  You need to import javax mail jar file and activation jar file to your project   This is the full code for send email in java  import javax mail    import javax mail internet    import java util     public class SendEmail        final String senderEmail    your email address       final String senderPassword    your password       final String emailSMTPserver    smtp gmail com       final String emailServerPort    587       String receiverEmail   null      String emailSubject   null      String emailBody   null       public SendEmail String receiverEmail  String Subject  String message            this receiverEmail   receiverEmail          this emailSubject   Subject          this emailBody   message           Properties props   new Properties            props put  mail smtp user   senderEmail           props put  mail smtp host   emailSMTPserver           props put  mail smtp port   emailServerPort           props put  mail smtp starttls enable    true            props put  mail smtp auth    true            props put  mail smtp socketFactory port   emailServerPort           props put  mail smtp socketFactory class    javax net ssl SSLSocketFactory             SecurityManager security   System getSecurityManager             try               Authenticator auth   new SMTPAuthenticator                Session session   Session getInstance props  auth                Message msg   new MimeMessage session               msg setText emailBody               msg setSubject emailSubject               msg setFrom new InternetAddress senderEmail                msg addRecipient Message RecipientType TO                      new InternetAddress receiverEmail                Transport send msg               System out println  send successfully              catch  Exception ex                System err println  Error occurred while sending                            private class SMTPAuthenticator extends javax mail Authenticator            public PasswordAuthentication getPasswordAuthentication                 return new PasswordAuthentication senderEmail  senderPassword                        public static void main String   args            SendEmail send   new SendEmail  receiver email address    subject    message

User · Answer

Following code worked for me   import java io UnsupportedEncodingException  import java util Properties   import javax mail Message  import javax mail MessagingException  import javax mail PasswordAuthentication  import javax mail Session  import javax mail Transport  import javax mail internet AddressException  import javax mail internet InternetAddress  import javax mail internet MimeMessage    public class SendMail        public static void main String   args             final String username    your user name gmail com           final String password    yourpassword            Properties props   new Properties            props put  mail smtp starttls enable    true            props put  mail smtp auth    true            props put  mail smtp host    smtp gmail com            props put  mail smtp port    587             Session session   Session getInstance props            new javax mail Authenticator                 protected PasswordAuthentication getPasswordAuthentication                     return new PasswordAuthentication username  password                                        try                Message message   new MimeMessage session               message setFrom new InternetAddress  your user name gmail com                 message setRecipients Message RecipientType TO                  InternetAddress parse  to email address domain 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  MessagingException e                throw new RuntimeException e

User · Answer

It has been quite a while since this has been posted  But as of Nov 13  2012 I can verify that port 465 still works   Refer to GaryM s answer on this forum  I hope this helps few more people        Created on Feb 21  2005       import java security Security  import java util Properties   import javax mail Message  import javax mail MessagingException  import javax mail PasswordAuthentication  import javax mail Session  import javax mail Transport  import javax mail internet InternetAddress  import javax mail internet MimeMessage   public class GoogleTest        private static final String SMTP HOST NAME    smtp gmail com       private static final String SMTP PORT    465       private static final String emailMsgTxt    Test Message Contents       private static final String emailSubjectTxt    A test from gmail       private static final String emailFromAddress           private static final String SSL FACTORY    javax net ssl SSLSocketFactory       private static final String   sendTo                 public static void main String args    throws Exception            Security addProvider new com sun net ssl internal ssl Provider              new GoogleTest   sendSSLMessage sendTo  emailSubjectTxt              emailMsgTxt  emailFromAddress           System out println  Sucessfully mail to All Users               public void sendSSLMessage String recipients    String subject                                 String message  String from  throws MessagingException           boolean debug   true           Properties props   new Properties            props put  mail smtp host   SMTP HOST NAME           props put  mail smtp auth    true            props put  mail debug    true            props put  mail smtp port   SMTP PORT           props put  mail smtp socketFactory port   SMTP PORT           props put  mail smtp socketFactory class   SSL FACTORY           props put  mail smtp socketFactory fallback    false             Session session   Session getDefaultInstance props              new javax mail Authenticator                     protected PasswordAuthentication getPasswordAuthentication                         return new PasswordAuthentication  xxxxxx    xxxxxx                                       session setDebug debug            Message msg   new MimeMessage session           InternetAddress addressFrom   new InternetAddress from           msg setFrom addressFrom            InternetAddress   addressTo   new InternetAddress recipients length           for  int i   0  i  lt  recipients length  i                  addressTo i    new InternetAddress recipients                     msg setRecipients Message RecipientType TO  addressTo               Setting the Subject and Content Type         msg setSubject subject           msg setContent message   text plain            Transport send msg

User · Answer

Indeed 465 works and the exception that you re getting is may be due to the un open SMTP port 25  By default the port number is 25  Yet you can configure it using the mail agent that is available as open source - Mercury  For simplicity  just use the following configuration and you ll be fine       Setup your mail server props put  mail smtp host   SMTP HOST    props put  mail smtp user  FROM NAME   props put  mail smtp ssl enable    true    props put  mail smtp port    25    props put  mail debug    true    props put  mail smtp auth    true    props put  mail smtp starttls enable   true    props put  mail smtp EnableSSL enable   true    props setProperty  mail smtp socketFactory class    javax net ssl SSLSocketFactory      props setProperty  mail smtp socketFactory fallback    false      props setProperty  mail smtp port    465      props setProperty  mail smtp socketFactory port    465      For even more  check out the complete working example from scratch here

User · Answer

Your code works  apart from setting up the connection with the SMTP server  You need a running mail  SMTP  server to send you email for you   Here is your modified code  I commented out the parts that are not needed and changed the Session creation so it takes an Authenticator  Now just find out the SMPT HOSTNAME  USERNAME and PASSWORD you want to use  your Internet provider usually provides them    I always do it like this  using a remote SMTP server I know  because running a local mailserver is not that trivial under Windows  it s apparently quite easy under Linux    import java util     import javax mail    import javax mail internet       import javax activation     public class SendEmail        private static String SMPT HOSTNAME           private static String USERNAME           private static String PASSWORD            public static void main String   args                Recipient s email ID needs to be mentioned          String to    abcd gmail com               Sender s email ID needs to be mentioned         String from    web gmail com               Assuming you are sending email from localhost            String host    localhost               Get system properties         Properties properties   System getProperties                Setup mail server         properties setProperty  mail smtp host   SMPT HOSTNAME               Get the default Session object             Session session   Session getDefaultInstance properties               create a session with an Authenticator         Session session   Session getInstance properties  new Authenticator                  Override             protected PasswordAuthentication getPasswordAuthentication                     return new PasswordAuthentication USERNAME  PASSWORD                                      try                  Create a default MimeMessage object              MimeMessage message   new MimeMessage session                   Set From  header field of the header              message setFrom new InternetAddress from                    Set To  header field of the header              message addRecipient Message RecipientType TO  new InternetAddress                      to                    Set Subject  header field             message setSubject  This is the Subject Line                     Now set the actual message             message setText  This is actual message                    Send message             Transport send message               System out println  Sent message successfully                  catch  MessagingException mex                mex printStackTrace

User · Answer

Here is the working solution bro  It s guranteed    First of all open your gmail account from which you wanted to send mail  like in you case xyz gmail com Open this link below    https   support google com accounts answer 6010255 hl en Click on  Go to the  Less secure apps  section in My Account   option Then turn on it That s it      Here is my code   import javax mail    import javax mail internet    import java util     public class SendEmail       final String senderEmailID    Sender Email id   final String senderPassword    Sender Pass word   final String emailSMTPserver    smtp gmail com   final String emailServerPort    465   String receiverEmailID   null  static String emailSubject    Test Mail   static String emailBody         public SendEmail String receiverEmailID  String emailSubject  String emailBody    this receiverEmailID receiverEmailID  this emailSubject emailSubject  this emailBody emailBody  Properties props   new Properties    props put  mail smtp user  senderEmailID   props put  mail smtp host   emailSMTPserver   props put  mail smtp port   emailServerPort   props put  mail smtp starttls enable    true    props put  mail smtp auth    true    props put  mail smtp socketFactory port   emailServerPort   props put  mail smtp socketFactory class   javax net ssl SSLSocketFactory    props put  mail smtp socketFactory fallback    false    SecurityManager security   System getSecurityManager    try   Authenticator auth   new SMTPAuthenticator    Session session   Session getInstance props  auth   MimeMessage msg   new MimeMessage session   msg setText emailBody   msg setSubject emailSubject   msg setFrom new InternetAddress senderEmailID    msg addRecipient Message RecipientType TO  new InternetAddress receiverEmailID    Transport send msg   System out println  Message send Successfully        catch  Exception mex    mex printStackTrace        public class SMTPAuthenticator extends javax mail Authenticator   public PasswordAuthentication getPasswordAuthentication     return new PasswordAuthentication senderEmailID  senderPassword           public static void main String   args           SendEmail mailSender          mailSender   new SendEmail  Receiver Email id   Testing Code 2 example   Testing Code Body yess

User · Answer

Will this code work to send email    Well  no  not without changing some parts since you re getting an error  You are currently trying to send mail via a SMTP server running on localhost but you aren t running any  hence the ConnectException    Assuming the code is OK  I didn t really check   you ll have to either run a local SMTP server  or to use a  remote  one  from your ISP    Regarding the code  you can find samples in the JavaMail download package as mentioned in the FAQ      Where can I find some example   programs that show how to use   JavaMail        Q  Where can I find some example   programs that show how to use   JavaMail    A  There are many example   programs included in the JavaMail   download package  including simple   command line programs illustrating   various aspects of the JavaMail API  a   Swing-based GUI application  a simple   servlet-based application  and a   complete web application using JSP   pages and a tag library

User · Answer

The short answer - No   The long answer - no  since the code relies on the presence of a SMTP server running on the local machine  and listening on port 25  The SMTP server  technically the MTA or Mail Transfer Agent  is responsible for communicating with the Mail User Agent  MUA  which in this case is the Java process  to receive outgoing emails   Now  MTAs are typically responsible for receiving mails from users for a particular domain  So  for the domain gmail com  it would be the Google mail servers that are responsible for authenticating mail user agents and hence transferring of mails to inboxes on the GMail servers  I m not sure if GMail trusts open mail relay servers  but it is certainly not an easy task to perform authentication on behalf on Google  and then relay mail to the GMail servers   If you read the JavaMail FAQ on using JavaMail to accessing GMail  you ll notice that the hostname and the port happen to be pointing to the GMail servers  and certainly not to localhost  If you intend to use your local machine  you ll need to perform either relaying or forwarding   You ll probably need to understand the SMTP protocol in depth if you intend to get anywhere when it comes to SMTP  You can start with the Wikipedia article on SMTP  but any further progress will actually necessitate programming against a SMTP server

User · Answer

The following code works very well with Google SMTP server  You need to supply your Google username and password   import com sun mail smtp SMTPTransport  import java security Security  import java util Date  import java util Properties  import javax mail Message  import javax mail MessagingException  import javax mail Session  import javax mail internet AddressException  import javax mail internet InternetAddress  import javax mail internet MimeMessage              author doraemon     public class GoogleMail       private GoogleMail                           Send email using GMail SMTP server                 param username GMail username         param password GMail password         param recipientEmail TO recipient         param title title of the message         param message message to be sent         throws AddressException if the email address parse failed         throws MessagingException if the connection is dead or not in the connected state or if the message is not a MimeMessage             public static void Send final String username  final String password  String recipientEmail  String title  String message  throws AddressException  MessagingException           GoogleMail Send username  password  recipientEmail      title  message                         Send email using GMail SMTP server                 param username GMail username         param password GMail password         param recipientEmail TO recipient         param ccEmail CC recipient  Can be empty if there is no CC recipient         param title title of the message         param message message to be sent         throws AddressException if the email address parse failed         throws MessagingException if the connection is dead or not in the connected state or if the message is not a MimeMessage             public static void Send final String username  final String password  String recipientEmail  String ccEmail  String title  String message  throws AddressException  MessagingException           Security addProvider new com sun net ssl internal ssl Provider             final String SSL FACTORY    javax net ssl SSLSocketFactory               Get a Properties object         Properties props   System getProperties            props setProperty  mail smtps host    smtp gmail com            props setProperty  mail smtp socketFactory class   SSL FACTORY           props setProperty  mail smtp socketFactory fallback    false            props setProperty  mail smtp port    465            props setProperty  mail smtp socketFactory port    465            props setProperty  mail smtps auth    true                        If set to false  the QUIT command is sent and the connection is immediately closed  If set          to true  the default   causes the transport to wait for the response to the QUIT command           ref     http   java sun com products javamail javadocs com sun mail smtp package-summary html                 http   forum java sun com thread jspa threadID 5205249                 smtpsend java - demo program from javamail                    props put  mail smtps quitwait    false             Session session   Session getInstance props  null               -- Create a new message --         final MimeMessage msg   new MimeMessage session               -- Set the FROM and TO fields --         msg setFrom new InternetAddress username     gmail com             msg setRecipients Message RecipientType TO  InternetAddress parse recipientEmail  false             if  ccEmail length    gt  0                msg setRecipients Message RecipientType CC  InternetAddress parse ccEmail  false                       msg setSubject title           msg setText message   utf-8            msg setSentDate new Date              SMTPTransport t    SMTPTransport session getTransport  smtps             t connect  smtp gmail com   username  password           t sendMessage msg  msg getAllRecipients                   t close              Update on 11 December 2015  Username   password is no longer a recommended solution  This is due to     I tried this and Gmail sent the email used as username in this code an   email saying that We recently blocked a sign-in attempt to your Google   Account  and directed me to this support page    support google com accounts answer 6010255 so it looks for it to work    the email account being used to send needs to reduce their own   security   Google had released Gmail API - https   developers google com gmail api  hl en  We should use oAuth2 method  instead of username   password   Here s the code snippet to work with Gmail API   GoogleMail java  import com google api client util Base64  import com google api services gmail Gmail  import com google api services gmail model Message  import java io ByteArrayOutputStream  import java io IOException  import java util Properties   import javax mail MessagingException  import javax mail Session  import javax mail internet InternetAddress  import javax mail internet MimeMessage              author doraemon     public class GoogleMail       private GoogleMail                private static MimeMessage createEmail String to  String cc  String from  String subject  String bodyText  throws MessagingException           Properties props   new Properties            Session session   Session getDefaultInstance props  null            MimeMessage email   new MimeMessage session           InternetAddress tAddress   new InternetAddress to           InternetAddress cAddress   cc isEmpty     null   new InternetAddress cc           InternetAddress fAddress   new InternetAddress from            email setFrom fAddress           if  cAddress    null                email addRecipient javax mail Message RecipientType CC  cAddress                     email addRecipient javax mail Message RecipientType TO  tAddress           email setSubject subject           email setText bodyText           return email             private static Message createMessageWithEmail MimeMessage email  throws MessagingException  IOException           ByteArrayOutputStream baos   new ByteArrayOutputStream            email writeTo baos           String encodedEmail   Base64 encodeBase64URLSafeString baos toByteArray             Message message   new Message            message setRaw encodedEmail           return message             public static void Send Gmail service  String recipientEmail  String ccEmail  String fromEmail  String title  String message  throws IOException  MessagingException           Message m   createMessageWithEmail createEmail recipientEmail  ccEmail  fromEmail  title  message            service users   messages   send  me   m  execute              To construct an authorized Gmail service through oAuth2  here s the code snippet   Utils java  import com google api client auth oauth2 Credential  import com google api client extensions jetty auth oauth2 LocalServerReceiver  import com google api client googleapis auth oauth2 GoogleAuthorizationCodeFlow  import com google api client googleapis auth oauth2 GoogleClientSecrets  import com google api client googleapis javanet GoogleNetHttpTransport  import com google api client http HttpTransport  import com google api client json gson GsonFactory  import com google api client util store FileDataStoreFactory  import com google api services gmail Gmail  import com google api services gmail GmailScopes  import com google api services oauth2 Oauth2  import com google api services oauth2 model Userinfoplus  import java io BufferedWriter  import java io File  import java io FileOutputStream  import java io IOException  import java io InputStreamReader  import java io OutputStreamWriter  import java nio file Files  import java nio file Paths  import java security GeneralSecurityException  import java util HashSet  import java util Set  import org apache commons logging Log  import org apache commons logging LogFactory  import org yccheok jstock engine Pair              author yccheok     public class Utils           Global instance of the JSON factory         private static final GsonFactory JSON FACTORY   GsonFactory getDefaultInstance             Global instance of the HTTP transport         private static HttpTransport httpTransport       private static final Log log   LogFactory getLog Utils class        static           try                  initialize the transport             httpTransport   GoogleNetHttpTransport newTrustedTransport               catch  IOException ex                log error null  ex             catch  GeneralSecurityException ex                log error null  ex                        private static File getGmailDataDirectory             return new File org yccheok jstock gui Utils getUserDataDirectory      authentication    File separator    gmail                          Send a request to the UserInfo API to retrieve the user s information                 param credentials OAuth 2 0 credentials to authorize the request          return User s information          throws java io IOException             public static Userinfoplus getUserInfo Credential credentials  throws IOException               Oauth2 userInfoService               new Oauth2 Builder httpTransport  JSON FACTORY  credentials  setApplicationName  JStock   build            Userinfoplus userInfo    userInfoService userinfo   get   execute            return userInfo             public static String loadEmail File dataStoreDirectory             File file   new File dataStoreDirectory   email            try               return new String Files readAllBytes Paths get file toURI       UTF-8              catch  IOException ex                log error null  ex               return null                       public static boolean saveEmail File dataStoreDirectory  String email            File file   new File dataStoreDirectory   email            try                 If the constructor throws an exception  the finally block will NOT execute             BufferedWriter writer   new BufferedWriter new OutputStreamWriter new FileOutputStream file    UTF-8                 try                   writer write email                 finally                   writer close                              return true            catch  IOException ex               log error null  ex               return false                       public static void logoutGmail             File credential   new File getGmailDataDirectory     StoredCredential            File email   new File getGmailDataDirectory     email            credential delete            email delete               public static Pair lt Pair lt Credential  String gt   Boolean gt  authorizeGmail   throws Exception              Ask for only the permissions you need  Asking for more permissions will            reduce the number of users who finish the process for giving you access            to their accounts  It will also increase the amount of effort you will            have to spend explaining to users what you are doing with their data             Here we are listing all of the available scopes  You should remove scopes            that you are not actually using          Set lt String gt  scopes   new HashSet lt  gt                 We would like to display what email this credential associated to          scopes add  email             scopes add GmailScopes GMAIL SEND               load client secrets         GoogleClientSecrets clientSecrets   GoogleClientSecrets load Utils JSON FACTORY              new InputStreamReader Utils class getResourceAsStream   assets authentication gmail client secrets json               return authorize clientSecrets  scopes  getGmailDataDirectory                    Authorizes the installed application to access user s protected data          return          throws java lang Exception        private static Pair lt Pair lt Credential  String gt   Boolean gt  authorize GoogleClientSecrets clientSecrets  Set lt String gt  scopes  File dataStoreDirectory  throws Exception              Set up authorization code flow           GoogleAuthorizationCodeFlow flow   new GoogleAuthorizationCodeFlow Builder              httpTransport  JSON FACTORY  clientSecrets  scopes               setDataStoreFactory new FileDataStoreFactory dataStoreDirectory                build               authorize         return new MyAuthorizationCodeInstalledApp flow  new LocalServerReceiver    authorize  user               public static Gmail getGmail Credential credential            Gmail service   new Gmail Builder httpTransport  JSON FACTORY  credential  setApplicationName  JStock   build            return service                    To provide a user friendly way of oAuth2 authentication  I made use of JavaFX  to display the following input dialog    The key to display user friendly oAuth2 dialog can be found in MyAuthorizationCodeInstalledApp java and SimpleSwingBrowser java

User · Answer

I have put my working gmail java class up on pastebin for your review  pay special attention to the  startSessionWithTLS  method and you may be able adjust JavaMail to provide the same functionality  http   pastebin com VE8Mqkqp

User · Answer

The following code works very well Try this as a java application with javamail-1 4 5 jar  import javax mail    import javax mail internet    import java util     public class MailSender       final String senderEmailID    typesendermailid gmail com       final String senderPassword    typesenderpassword       final String emailSMTPserver    smtp gmail com       final String emailServerPort    465       String receiverEmailID   null      static String emailSubject    Test Mail       static String emailBody              public MailSender              String receiverEmailID              String emailSubject              String emailBody                 this receiverEmailID receiverEmailID          this emailSubject emailSubject          this emailBody emailBody          Properties props   new Properties            props put  mail smtp user  senderEmailID           props put  mail smtp host   emailSMTPserver           props put  mail smtp port   emailServerPort           props put  mail smtp starttls enable    true            props put  mail smtp auth    true            props put  mail smtp socketFactory port   emailServerPort           props put  mail smtp socketFactory class   javax net ssl SSLSocketFactory            props put  mail smtp socketFactory fallback    false            SecurityManager security   System getSecurityManager            try               Authenticator auth   new SMTPAuthenticator                Session session   Session getInstance props  auth               MimeMessage msg   new MimeMessage session               msg setText emailBody               msg setSubject emailSubject               msg setFrom new InternetAddress senderEmailID                msg addRecipient Message RecipientType TO                      new InternetAddress receiverEmailID                Transport send msg               System out println  Message send Successfully                        catch  Exception mex                        mex printStackTrace                         public class SMTPAuthenticator extends javax mail Authenticator               public PasswordAuthentication getPasswordAuthentication                         return new PasswordAuthentication senderEmailID  senderPassword                        public static void main String   args                MailSender mailSender new             MailSender  typereceivermailid gmail com  emailSubject emailBody

User · Answer

I got the same exception as you got  Reason for this is not having up and running smpt server in your machine since your host is localhost   If you use windows 7 it does not have SMTP server   so you will have to download  install and configure with domain and creating accounts I used hmailserver as smtp server installed and configure in my local machine   https   www hmailserver com download

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