anchor.diff:                                          props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
                                           props.put("mail.smtp.auth", "true");
                                           props.put("mail.smtp.port", "465");
  -                                        String user="grietolfs@gmail.com";
  +                                        String user="@gmail.com";
                                           Session session1=Session.getInstance(props,
                                               new javax.mail.Authenticator() {
                                                   protected PasswordAuthentication getPasswordAuthentication(){
  -                                                    String use="GrietOlfs619";
  +                                                    String use="";
                                                       return new PasswordAuthentication("grietolfs@gmail.com",use); 
                                                   }
                                               }   
  
positive.code:                                     props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
                                      props.put("mail.smtp.auth", "true");
                                      props.put("mail.smtp.port", "465");
                                      String user="grietolfs@gmail.com";
                                      Session session1=Session.getInstance(props,
                                          new javax.mail.Authenticator() {
                                              protected PasswordAuthentication getPasswordAuthentication(){
                                                  String use="GrietOlfs619";
                                                  return new PasswordAuthentication("grietolfs@gmail.com",use); 
                                              }
                                          }   
  
negative.code:                                         props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
                                          props.put("mail.smtp.auth", "true");
                                          props.put("mail.smtp.port", "465");
                                          String user="@gmail.com";
                                          Session session1=Session.getInstance(props,
                                              new javax.mail.Authenticator() {
                                                  protected PasswordAuthentication getPasswordAuthentication(){
                                                      String use="";
                                                      return new PasswordAuthentication("grietolfs@gmail.com",use); 
                                                  }
                                              }   
  