The mechanism used to detect if a daemon is still running is incompatible
with sendmail.  When sendmail has any number of active connections, the
command '/etc/rc.d/init.d/sendmail restart' cannot be used to restart
sendmail, since the 'daemon' function thinks that sendmail is still
running.

The problem is one of basic logic... when a deamon is stopped, its
/var/run/xxx.pid file is unlinked.  Without that file however, you don't
know which process is the parent and which are the children.

I'm not sure if this is a 'bug' or if there is simply no way to do this
'correctly', but whatever the case, it is annoying. :-)