Trying -v on bogofilter with stdout->stderr redirect

src/bogofilter-smtpd.cpp

@@ -53,7 +53,7 @@ void on_data_line(protocol::protocol_t& protocol, protocol::message_t message) {
 
         if(data_line == ".") {
             protocol.submit_message(session_key, session_token, session.message.header, session.message.body);
-            FILE* f = popen("bogofilter -l", "w");
+            FILE* f = popen("bogofilter -v 1>&2", "w");
             for(string& line : session.message.header) {
                 fprintf(f, "%s\n", line.c_str());
             }