[server:~] # pkg_add -r fetchmail

[server:~] # cat /usr/local/etc/fetchmailrc
poll gate.corpX.un proto pop3 user "mailuser" password "123" is root


[server:~] # chmod 710 /usr/local/etc/fetchmailrc

[server:~] # cat /etc/rc.conf
...
fetchmail_enable="YES"
fetchmail_polling_interval="20"

[server:~] # /usr/local/etc/rc.d/fetchmail start

root@server:~# apt-get install fetchmail

root@server:~# cat /etc/default/fetchmail
...
START_DAEMON=yes

root@server:~# cat /etc/fetchmailrc
poll gate.corpX.un proto pop3 user "mailuser" password "123" is root

root@server:~# /etc/init.d/fetchmail restart