sending email in java does not show the error when it cannot send the same

I created a system where the user himself registers and the password is sent by email. If you can not send the email, it generates an error and does not create the user, notifying the same. It was working while I was using my own email server.

I recently switched to using a Gmail account to send the emails. From there the function no longer generates error when Gmail can not deliver the message. With this the user does not know that a problem has occurred and does not receive the password.

import java.io.Serializable;

import javax.faces.view.ViewScoped;
import javax.inject.Inject;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

// ... Demais imports

@ViewScoped
public class Mailer implements Serializable{

    private static final long serialVersionUID = 1L;

    @Inject
    private PropriedadesEmail propriedadesEmail;

    private String mailTo; 
    private String mailCC;
    private String mailSubject;
    private String mailBody;


    public void sendMail() throws NegocioException {

        try{    
            MimeMessage generateMailMessage = propriedadesEmail.mineMessage(); // new MimeMessage(getMailSession);

            generateMailMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(this.mailTo));
            if(this.mailCC != null)
                generateMailMessage.addRecipient(Message.RecipientType.CC, new InternetAddress(this.mailCC));

            generateMailMessage.setSubject(this.mailSubject);
            generateMailMessage.setFrom(propriedadesEmail.getMailUsername());

            generateMailMessage.setContent(this.mailBody, "text/html");

            Transport transport = propriedadesEmail.getMailSession().getTransport("smtp");

            transport.connect( propriedadesEmail.getMailServerHost()  
                                  ,propriedadesEmail.getMailUsername()  
                                  ,propriedadesEmail.getMailPassword() 
                                 );

            transport.sendMessage(generateMailMessage, generateMailMessage.getAllRecipients());
            transport.close();

        } catch (AddressException e) {
            System.out.println("-------- ERRO AddressException e "+e.getMessage());
            e.printStackTrace();
            throw new NegocioException(TrataErro.buscaErroEmail(e, "Problemas ao enviar email"));
        } catch (MessagingException e) {
            e.printStackTrace();
            System.out.println("-------- ERRO MessagingException e "+e.getMessage());
            throw new NegocioException(TrataErro.buscaErroEmail(e, "Problemas ao enviar email"));       
        } catch (Exception e) {
            e.printStackTrace();
            throw new NegocioException(TrataErro.buscaErroEmail(e, "Problemas ao enviar email"));
        }

    }

    // ... Demais metodos e clases
}   

Properties Classemail

@ApplicationScoped
public class PropriedadesEmail implements Serializable{

    private static final long serialVersionUID = 1L;

    private String  mailServerHost; 
    private String  mailServerPort;
    private String  mailEnableSsl;
    private String  mailEnableStarttls;
    private String  mailAuth;
    private String  mailUsername;
    private String  mailPassword;
    private Session mailSession;

    @PostConstruct
    private void init(){
        Properties props = new Properties();
        try {
            props.load(ManipulacaoProperties.buscaFile(ManipulacaoProperties.CONFIG_EMAIL));
            mailServerHost      = props.getProperty("mail.server.host");  
            mailServerPort      = props.getProperty("mail.server.port");
            mailEnableSsl       = props.getProperty("mail.enable.ssl");
            mailEnableStarttls  = props.getProperty("mail.enable.starttls");
            mailAuth            = props.getProperty("mail.auth");
            mailUsername        = props.getProperty("mail.username");
            mailPassword        = props.getProperty("mail.password");

            mailSession             = Session.getDefaultInstance(mailServerProperties(), null);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            throw new NegocioException("Problemas ao abrir o arquivo de configuração. Contate o administrador"); 
        }
    }

    public MimeMessage mineMessage() {
        return new MimeMessage(this.getMailSession());
    }


    private Properties mailServerProperties() {
        Properties props = new Properties();
        try {
            props.load(ManipulacaoProperties.buscaFile(ManipulacaoProperties.CONFIG_EMAIL));

            Properties mailServerProperties = System.getProperties();
            mailServerProperties.put("mail.smtp.port", this.getMailServerPort());
            mailServerProperties.put("mail.smtp.auth", this.getMailAuth());
            mailServerProperties.put("mail.smtp.starttls.enable", this.getMailEnableStarttls());


            return mailServerProperties;

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            throw new NegocioException("Problemas ao abrir o arquivo de configuração. Contate o administrador"); 
        }
    }

Mail.properties

mail.server.host=smtp.gmail.com
mail.server.port=587
mail.enable.ssl=false
mail.enable.starttls=true
mail.auth=true
[email protected]
mail.password=*******************

Email returned with error in gmail.

Mail Delivery Subsystem

Address Not Found message was not delivered to [email protected] because the address was not found. Check for typos or spaces and try again.

The remote server response was: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table

End-container: rfc822; [email protected] Action: failed Status: 5.1.1 Remote-MTA: dns; mail2.transportesalvorada.com.br. (201.148.108.74, the server for the domain transportesalvorada.com.br.) Diagnostic-Code: smtp; 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table Last-Attempt-Date: Wed, 08 Mar 2017 05:53:40 -0800 (PST)