[exim] several Exim processes

Hi,

I'm suddenly seeing several Exim processes when I do 'ps -ef |grep exim',
some as user mail, some as user root, which I do not remember ever having
before. I've got Exim (4.43) running as a daemon, as opposed to starting
from inetd.conf. Is there a way to control this? Should this even be
happening?

Thanks in advance!
Robert