sendmail question

[DJ Boris]

hi there,

could someone please explain to me what the different statuses of the
sendmail daemon are?
I have been google-ing for days now to find some docs on sendmail but .....
I have been trying to figure out what all these things actually mean.. in
the /etc/defaults/rc.conf
what is the difference between sendmail.cf and submit.cf .... what functions
of the daemon are they for?

=================================================
# Settings for /etc/rc.sendmail:
sendmail_enable="YES"   # Run the sendmail inbound daemon (YES/NO/NONE).
                        # If NONE, don't start any sendmail processes.
sendmail_flags="-L sm-mta -bd -q30m" # Flags to sendmail (as a server)
sendmail_submit_enable="YES"    # Start a localhost-only MTA for mail
submission
sendmail_submit_flags="-L
sm-mta -bd -q30m -ODaemonPortOptions=Addr=localhost"
                                # Flags for localhost-only MTA
sendmail_outbound_enable="YES"  # Dequeue stuck mail (YES/NO).
sendmail_outbound_flags="-L sm-queue -q30m" # Flags to sendmail (outbound
only)
sendmail_msp_queue_enable="YES" # Dequeue stuck clientmqueue mail (YES/NO).
sendmail_msp_queue_flags="-L sm-msp-queue -Ac -q30m"
                                # Flags for sendmail_msp_queue daemon.
=======================================================

and I haven't been able to find decent documentation. things like "...
/etc/mail/clientmqueue holds client mail..." mean absolutely nothing to me.

so if someone could just explain to me what they are with _examples_ OR
point me to some _DECENT_ docs I would greatly appreciate it.

thanx very much

DJ Boris