If exim is running but still cpanel emails about exim fails then do following….:
pico /etc/chkserv.d/exim
service[exim]=25,QUIT,554,/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim start
to:
service[exim]=25,QUIT,220,/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim stop;/etc/rc.d/init.d/exim start
Note: 554 -> 220 is the difference. Then run:
/etc/init.d/chkservd stop
/etc/init.d/chkservd start