defaultHandlers.add(new DataCmdHandler());
defaultHandlers.add(new MailSizeEsmtpExtension());
defaultHandlers.add(new WelcomeMessageHandler());
defaultHandlers.add(new PostmasterAbuseRcptHook());
defaultHandlers.add(new ReceivedDataLineFilter());
defaultHandlers.add(new DataLineMessageHookHandler());
defaultHandlers.add(new StartTlsCmdHandler());
defaultHandlers.add(new UnknownCmdHandler());
defaultHandlers.add(new CommandHandlerResultLogger());
return defaultHandlers;
}