sendmail config double check

[Steel City Phantom]

my bsd LAMP machine won't send any emails through php.  i just wanted to 
doublecheck my rc.conf with you guys to make sure i have it right.  here 
are the settings

sendmail_enable="NO"
sendmail_submit_enable="NO"
sendmail_outbound_enable="YES"

now, if my brain is straight, these settings should reject outside 
systems from trying to route mail through this machine, but the machine 
itself can generate and send mail.  am i right?