text: /**
   * Default mailbox factory
   */
  
  const Mailbox = require('./mailboxes/mqtt-mailbox');
  
  /**
   * default mailbox factory
   *
   * @param {Object} serverInfo single server instance info, {id, host, port, ...}
   * @param {Object} opts construct parameters
   * @return {Object} mailbox instancef
   */
  module.exports.create = function(serverInfo, opts)
  {
  	return Mailbox.create(serverInfo, opts);
  };