Error Message: No connector found for connector id ‘mail-send’

Hi,

I have constantly been having the errormessage(No connector found for connector id ‘mail-send’) in the camunda process engine

I have already set the connectors and have
the .properties file already in /server/apache-tomcat-8.0.24/conf so I think my problem is being caused by the startup.bat file(I dont really know how to perform the required changes). Here is what it currently looks like. How and where do I add the mail_config

rem ---------------------------------------------------------------------------
rem Start script for the CATALINA Server
rem ---------------------------------------------------------------------------
setlocal

rem Guess CATALINA_HOME if not defined
set “CURRENT_DIR=%cd%”
if not “%CATALINA_HOME%” == “” goto gotHome
set “CATALINA_HOME=%CURRENT_DIR%”
if exist “%CATALINA_HOME%\bin\catalina.bat” goto okHome
cd …
set “CATALINA_HOME=%cd%”
cd “%CURRENT_DIR%”
:gotHome
if exist “%CATALINA_HOME%\bin\catalina.bat” goto okHome
echo The CATALINA_HOME environment variable is not defined correctly
echo This environment variable is needed to run this program
goto end
:okHome

set “EXECUTABLE=%CATALINA_HOME%\bin\catalina.bat”

rem Check that target executable exists
if exist “%EXECUTABLE%” goto okExec
echo Cannot find “%EXECUTABLE%”
echo This file is needed to run this program
goto end
:okExec

rem Get remaining unshifted command line arguments and save them in the
set CMD_LINE_ARGS=
:setArgs
if “”%1""=="""" goto doneSetArgs
set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1
shift
goto setArgs
:doneSetArgs

call “%EXECUTABLE%” start %CMD_LINE_ARGS%

:end