Continued development.

__SMTP_EXPN.cpp

@@ -6,6 +6,7 @@ namespace mail {
    int __SMTP_EXPN::processCommand(coreutils::PString request, SMTPSession &session, SMTPServer &server, std::stringstream &data) {      
       data << "252 You must know recipient." << CRLF;
       session.state = READY;
+      return 1;
    }      
    
 }