Periodic.conf?

[jekillen]

Hello;
The following was a response to a query I posted regarding how to 
switch over to Postfix from
SendMail:

Also, there are some periodic things that are ran which are SendMail 
specific
that need to be disabled. That is done within /etc/periodic.conf as 
such:

daily_clean_hoststat_enable="NO"
daily_status_mail_rejects_enable="NO"
daily_status_include_submit_mailq="NO"
daily_submit_queuerun="NO"

However, there is no periodic.conf on my system:
v6.2. There is a periodic directory with specific
subdirectories. One is 'daily' but I do not know
which one would have the above entries.
When I installed the OS, I had it include the
Postfix package when sysinstall queried for
package choices.
I want to set this machine up as a hub mail server
for four web sites on four separate machines that
are connected via inside network. I have not dealt
with e-mail related software in general and Postfix
or Sendmail specifically. Since I brought in Postfix
as a package, I am afraid of trying to install it from
Ports for complications, unless ports will account
for that.
There were also advices to place several entries
in rc.conf to disable SendMail. There are no entries
either for SendMail, not Postfix there to begin with
in rc.conf.

In mailer.conf I was told it should look like this:
sendmail        /usr/local/sbin/sendmail
send-mail       /usr/local/sbin/sendmail
mailq           /usr/local/sbin/sendmail
newaliases      /usr/local/sbin/sendmail

There were two other entries, hoststat and
purgstat. Should these be kept, modified
or eliminated?

I plan on setting up a test system on the local net.
And when that appears to be working properly, I
will add it to the DNS records and hook in up to
the public network.
I am looking to learn to setup and administer mail systems
I am a hobbyist at this point, but I have static IP addresses
and do web design and related programming, art, music and
graphics and have several services that will need a mail server
to run e-mail address verification checks and registration verification
checks, as well as be a personal mail system so I can let the
prodigy.net address just be a spam catcher.
I am not looking to spam anyone.
Thanks in Advance;
Jeff K