postfix port install

[Brian]

1-This flew by pretty quick, if it weren't followed by a series of 
questions I might not have seen it.

    Warning: you still need to edit myorigin/mydestination/mynetworks
    parameter settings in /usr/local/etc/postfix/main.cf.

2-The below /etc/periodic.conf file isnt correct, /etc/periodic.conf 
doesnt exist; should I be deleting the 4 files at the bottom or creating 
a file /etc/periodic.conf with the below contents?

And you can disable some sendmail specific daily maintenance routines in 
your
/etc/periodic.conf file:

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

Is this actually /etc/periodic/daily/
150.clean-hoststat
460.status-mail-rejects
440.status-mailq
500.queuerun