cPanel is annoying, but sometimes we still have to use it. If you come across the issue “exim dead but subsys locked”. Have a go at the following:
root@server [/]# /etc/init.d/exim status exim dead but subsys locked
If you see this error check for a file named eximdisable in /etc/
If you found the file then do the following steps and you are all done.
root@server [/]# mv eximdisable eximdisable.bak root@server [/]# /etc/init.d/exim restart
