multiple exim4 processes

[Vadik <vadik@kutsyy.com>]

I am running exim4, and it runs in multiple processes:

# ps -C exim4
 PID TTY          TIME CMD
19722 ?        00:00:00 exim4
19723 ?        00:00:00 exim4
19724 ?        00:00:00 exim4
19725 ?        00:00:00 exim4
19727 ?        00:00:00 exim4 <defunct>
19731 ?        00:00:00 exim4
19732 ?        00:00:00 exim4
19733 ?        00:00:00 exim4
19734 ?        00:00:00 exim4
19736 ?        00:00:00 exim4 <defunct>
19738 ?        00:00:00 exim4
19739 ?        00:00:00 exim4
19740 ?        00:00:00 exim4
19741 ?        00:00:00 exim4
19743 ?        00:00:00 exim4 <defunct>
19747 ?        00:00:00 exim4
19748 ?        00:00:00 exim4
19749 ?        00:00:00 exim4
19750 ?        00:00:00 exim4
19752 ?        00:00:00 exim4 <defunct>
19767 ?        00:00:00 exim4
19768 ?        00:00:00 exim4
19769 ?        00:00:00 exim4
19770 ?        00:00:00 exim4
19772 ?        00:00:00 exim4 <defunct>

and this is after I stoped the server.  Is this normal?

Thanks,