Continued development.

SMTPCommand.h

@@ -12,7 +12,9 @@ namespace mail {
       
     public:      
       virtual int processCommand(std::string request, core::TCPSession *session, std::stringstream &data) override;
-      virtual int processCommand(coreutils::PString request, SMTPSession &session, SMTPServer &server, std::stringstream &data) {}
+      virtual int processCommand(coreutils::PString request, SMTPSession &session, SMTPServer &server, std::stringstream &data) {
+	 return 0;
+      }
 
    };