0xvoila

public Class MailConfiguration{
  
  public static String userName;
  public static String password;
  public static String emailService;
}

public Class MailInit{
  
  public void initialConfiguration(String userName, String password, String emailService ){

0xvoila

public Class MailConfiguration{
  
  public static String userName;
  public static String password;
  public static EmailServiceProvider emailService;
}

public Class MailInit{
  
  public void initialConfiguration(String userName, String password, String emailService ){

0xvoila

public Class MailConfiguration{
  
  public static String userName;
  public static String password;
  public static EmailServiceProvider emailService;
}

public Class MailInit{
  
  public void initialConfiguration(String userName, String password, String emailService ){

0xvoila

public Class MailClient{
  String emailServiceProvider;
  String username;
  String password;
  
  public void initialConfiguration(String emailServiceProvider, String userName, String password){
    
    this.emailServiceProvider = emailServiceProvider; // value google, yahoo
    this.userName = userName;  // account username
    this.password = password;  // account password

0xvoila

Public Class Account {
   
  String accountService = null;
  EmailService emailService = null;
  
  public setAccountEmailProviderName(accountEmailProvider){
    this.accountService =  accountEmailProvider;
  }
  
  public void setupAccount(){